42240974731 has 4 divisors (see below), whose sum is σ = 42474350464. Its totient is φ = 42007599000.

The previous prime is 42240974701. The next prime is 42240974749. The reversal of 42240974731 is 13747904224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42240974731 - 2⁷ = 42240974603 is a prime.

It is a super-2 number, since 2×42240974731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42240974701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116687595 + ... + 116687956.

It is an arithmetic number, because the mean of its divisors is an integer number (10618587616).

Almost surely, 2^42240974731 is an apocalyptic number.

42240974731 is a deficient number, since it is larger than the sum of its proper divisors (233375733).

42240974731 is a wasteful number, since it uses less digits than its factorization.

42240974731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233375732.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 42240974731 in words is "forty-two billion, two hundred forty million, nine hundred seventy-four thousand, seven hundred thirty-one".