13897056213 has 6 divisors (see below), whose sum is σ = 20073525654. Its totient is φ = 9264704136.

The previous prime is 13897056197. The next prime is 13897056221. The reversal of 13897056213 is 31265079831.

13897056213 is a `hidden beast` number, since 1 + 3 + 8 + 9 + 70 + 562 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11338416324 + 2558639889 = 106482^2 + 50583^2 .

It is not a de Polignac number, because 13897056213 - 2⁴ = 13897056197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13897056223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 772058670 + ... + 772058687.

It is an arithmetic number, because the mean of its divisors is an integer number (3345587609).

Almost surely, 2^13897056213 is an apocalyptic number.

It is an amenable number.

13897056213 is a deficient number, since it is larger than the sum of its proper divisors (6176469441).

13897056213 is a wasteful number, since it uses less digits than its factorization.

13897056213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544117363 (or 1544117360 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 13897056213 in words is "thirteen billion, eight hundred ninety-seven million, fifty-six thousand, two hundred thirteen".