13971457052 has 24 divisors (see below), whose sum is σ = 27946813440. Its totient is φ = 5986931760.

The previous prime is 13971457033. The next prime is 13971457057. The reversal of 13971457052 is 25075417931.

It is a super-2 number, since 2×13971457052² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13971456994 and 13971457012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13971457057) 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, 196349 + ... + 257867.

It is an arithmetic number, because the mean of its divisors is an integer number (1164450560).

Almost surely, 2^13971457052 is an apocalyptic number.

It is an amenable number.

13971457052 is an abundant number, since it is smaller than the sum of its proper divisors (13975356388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13971457052 is a wasteful number, since it uses less digits than its factorization.

13971457052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69641 (or 69639 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 44.

The spelling of 13971457052 in words is "thirteen billion, nine hundred seventy-one million, four hundred fifty-seven thousand, fifty-two".