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52571352157 = 73720155509
BaseRepresentation
bin110000111101011111…
…110010110001011101
312000200210021101122221
4300331133302301131
51330131231232112
640052334305341
73540524056162
oct607537626135
9160623241587
1052571352157
1120328180a85
12a232058251
134c5a6c228c
14278a036069
15157a4b6e07
hexc3d7f2c5d

52571352157 has 4 divisors (see below), whose sum is σ = 53291507740. Its totient is φ = 51851196576.

The previous prime is 52571352133. The next prime is 52571352161. The reversal of 52571352157 is 75125317525.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14846447716 + 37724904441 = 121846^2 + 194229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-52571352157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52571352257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360077682 + ... + 360077827.

It is an arithmetic number, because the mean of its divisors is an integer number (13322876935).

Almost surely, 252571352157 is an apocalyptic number.

It is an amenable number.

52571352157 is a deficient number, since it is larger than the sum of its proper divisors (720155583).

52571352157 is an equidigital number, since it uses as much as digits as its factorization.

52571352157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720155582.

The product of its digits is 367500, while the sum is 43.

The spelling of 52571352157 in words is "fifty-two billion, five hundred seventy-one million, three hundred fifty-two thousand, one hundred fifty-seven".

Divisors: 1 73 720155509 52571352157