42051157831 has 4 divisors (see below), whose sum is σ = 42051641472. Its totient is φ = 42050674192.

The previous prime is 42051157787. The next prime is 42051157843. The reversal of 42051157831 is 13875115024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42051157831 - 2⁷ = 42051157703 is a prime.

It is a super-2 number, since 2×42051157831² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42051155831) 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, 71335 + ... + 298648.

It is an arithmetic number, because the mean of its divisors is an integer number (10512910368).

Almost surely, 2^42051157831 is an apocalyptic number.

42051157831 is a deficient number, since it is larger than the sum of its proper divisors (483641).

42051157831 is a wasteful number, since it uses less digits than its factorization.

42051157831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483640.

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 42051157831 in words is "forty-two billion, fifty-one million, one hundred fifty-seven thousand, eight hundred thirty-one".