31255021042 has 8 divisors (see below), whose sum is σ = 53580036096. Its totient is φ = 13395009012.

The previous prime is 31255020977. The next prime is 31255021069. The reversal of 31255021042 is 24012055213.

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

It is a junction number, because it is equal to n+sod(n) for n = 31255020998 and 31255021016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116250738 + ... + 1116250765.

It is an arithmetic number, because the mean of its divisors is an integer number (6697504512).

Almost surely, 2^31255021042 is an apocalyptic number.

31255021042 is a deficient number, since it is larger than the sum of its proper divisors (22325015054).

31255021042 is a wasteful number, since it uses less digits than its factorization.

31255021042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232501512.

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 31255021042 its reverse (24012055213), we get a palindrome (55267076255).

The spelling of 31255021042 in words is "thirty-one billion, two hundred fifty-five million, twenty-one thousand, forty-two".