31145552742 has 16 divisors (see below), whose sum is σ = 65569584960. Its totient is φ = 9835437672.

The previous prime is 31145552731. The next prime is 31145552743. The reversal of 31145552742 is 24725554113.

It is a self number, because there is not a number n which added to its sum of digits gives 31145552742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31145552743) 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, 136603188 + ... + 136603415.

It is an arithmetic number, because the mean of its divisors is an integer number (4098099060).

Almost surely, 2^31145552742 is an apocalyptic number.

31145552742 is an abundant number, since it is smaller than the sum of its proper divisors (34424032218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31145552742 is a wasteful number, since it uses less digits than its factorization.

31145552742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273206627.

The product of its digits is 168000, while the sum is 39.

The spelling of 31145552742 in words is "thirty-one billion, one hundred forty-five million, five hundred fifty-two thousand, seven hundred forty-two".