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87510413231 = 407921453889
BaseRepresentation
bin101000110000000000…
…1101110111110101111
322100212202021121002222
41101200001232332233
52413210131210411
6104111323505555
76215406145043
oct1214001567657
9270782247088
1087510413231
113412738a76a
1214b630882bb
1383380ca807
1443423dc023
152422a0b4db
hex146006efaf

87510413231 has 4 divisors (see below), whose sum is σ = 87531871200. Its totient is φ = 87488955264.

The previous prime is 87510413197. The next prime is 87510413233. The reversal of 87510413231 is 13231401578.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-87510413231 is a prime.

It is a super-2 number, since 2×875104132312 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87510413191 and 87510413200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87510413233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10722866 + ... + 10731023.

It is an arithmetic number, because the mean of its divisors is an integer number (21882967800).

Almost surely, 287510413231 is an apocalyptic number.

87510413231 is a deficient number, since it is larger than the sum of its proper divisors (21457969).

87510413231 is a wasteful number, since it uses less digits than its factorization.

87510413231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21457968.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 87510413231 in words is "eighty-seven billion, five hundred ten million, four hundred thirteen thousand, two hundred thirty-one".

Divisors: 1 4079 21453889 87510413231