31550331043 has 12 divisors (see below), whose sum is σ = 40037897592. Its totient is φ = 24584673120.

The previous prime is 31550331031. The next prime is 31550331053. The reversal of 31550331043 is 34013305513.

It is a de Polignac number, because none of the positive numbers 2^k-31550331043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31550331053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29266930 + ... + 29268007.

It is an arithmetic number, because the mean of its divisors is an integer number (3336491466).

Almost surely, 2^31550331043 is an apocalyptic number.

31550331043 is a deficient number, since it is larger than the sum of its proper divisors (8487566549).

31550331043 is a wasteful number, since it uses less digits than its factorization.

31550331043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58534962 (or 58534955 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 28.

Adding to 31550331043 its reverse (34013305513), we get a palindrome (65563636556).

The spelling of 31550331043 in words is "thirty-one billion, five hundred fifty million, three hundred thirty-one thousand, forty-three".