213431201397 has 32 divisors (see below), whose sum is σ = 318742905600. Its totient is φ = 141142201344.

The previous prime is 213431201329. The next prime is 213431201411. The reversal of 213431201397 is 793102134312.

213431201397 is a `hidden beast` number, since 2 + 1 + 34 + 31 + 201 + 397 = 666.

It is not a de Polignac number, because 213431201397 - 2¹⁰ = 213431200373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213431201317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5035429 + ... + 5077637.

It is an arithmetic number, because the mean of its divisors is an integer number (9960715800).

Almost surely, 2^213431201397 is an apocalyptic number.

213431201397 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

213431201397 is a deficient number, since it is larger than the sum of its proper divisors (105311704203).

213431201397 is a wasteful number, since it uses less digits than its factorization.

213431201397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43722 (or 43716 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 213431201397 in words is "two hundred thirteen billion, four hundred thirty-one million, two hundred one thousand, three hundred ninety-seven".