42431356397 has 8 divisors (see below), whose sum is σ = 44931814200. Its totient is φ = 39931398144.

The previous prime is 42431356369. The next prime is 42431356421. The reversal of 42431356397 is 79365313424.

It can be written as a sum of positive squares in 4 ways, for example, as 28510660201 + 13920696196 = 168851^2 + 117986^2 .

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 42431356397 - 2³² = 38136389101 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 (42431356307) 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, 57629 + ... + 296957.

It is an arithmetic number, because the mean of its divisors is an integer number (5616476775).

Almost surely, 2^42431356397 is an apocalyptic number.

It is an amenable number.

42431356397 is a deficient number, since it is larger than the sum of its proper divisors (2500457803).

42431356397 is a wasteful number, since it uses less digits than its factorization.

42431356397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249775.

The product of its digits is 1632960, while the sum is 47.

The spelling of 42431356397 in words is "forty-two billion, four hundred thirty-one million, three hundred fifty-six thousand, three hundred ninety-seven".