31555345442 has 8 divisors (see below), whose sum is σ = 47415914832. Its totient is φ = 15750040500.

The previous prime is 31555345441. The next prime is 31555345457. The reversal of 31555345442 is 24454355513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31555345442.

It is not an unprimeable number, because it can be changed into a prime (31555345441) 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, 13814684 + ... + 13816967.

It is an arithmetic number, because the mean of its divisors is an integer number (5926989354).

Almost surely, 2^31555345442 is an apocalyptic number.

31555345442 is a deficient number, since it is larger than the sum of its proper divisors (15860569390).

31555345442 is a wasteful number, since it uses less digits than its factorization.

31555345442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27632224.

The product of its digits is 720000, while the sum is 41.

The spelling of 31555345442 in words is "thirty-one billion, five hundred fifty-five million, three hundred forty-five thousand, four hundred forty-two".