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51123623513 = 1919313941539
BaseRepresentation
bin101111100111001101…
…001001011001011001
311212221220010011022112
4233213031021121121
51314200121423023
635252540402105
73456614426024
oct574715113131
9155856104275
1051123623513
111a754a53026
129aa9246335
134a897a2201
14268da5c1bb
1514e3345478
hexbe7349659

51123623513 has 8 divisors (see below), whose sum is σ = 54093175200. Its totient is φ = 48181955328.

The previous prime is 51123623479. The next prime is 51123623531. The reversal of 51123623513 is 31532632115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51123623513 - 26 = 51123623449 is a prime.

It is a super-2 number, since 2×511236235132 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51123623513.

It is not an unprimeable number, because it can be changed into a prime (51123623113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6967103 + ... + 6974436.

It is an arithmetic number, because the mean of its divisors is an integer number (6761646900).

Almost surely, 251123623513 is an apocalyptic number.

It is an amenable number.

51123623513 is a deficient number, since it is larger than the sum of its proper divisors (2969551687).

51123623513 is a wasteful number, since it uses less digits than its factorization.

51123623513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13941751.

The product of its digits is 16200, while the sum is 32.

The spelling of 51123623513 in words is "fifty-one billion, one hundred twenty-three million, six hundred twenty-three thousand, five hundred thirteen".

Divisors: 1 19 193 3667 13941539 264889241 2690717027 51123623513