31261042 has 16 divisors (see below), whose sum is σ = 49485600. Its totient is φ = 14770080.

The previous prime is 31261039. The next prime is 31261067. The reversal of 31261042 is 24016213.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19009 + ... + 20587.

It is an arithmetic number, because the mean of its divisors is an integer number (3092850).

Almost surely, 2^31261042 is an apocalyptic number.

31261042 is a deficient number, since it is larger than the sum of its proper divisors (18224558).

31261042 is a wasteful number, since it uses less digits than its factorization.

31261042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 31261042 is about 5591.1574830262. The cubic root of 31261042 is about 315.0173569003.

Adding to 31261042 its reverse (24016213), we get a palindrome (55277255).

The spelling of 31261042 in words is "thirty-one million, two hundred sixty-one thousand, forty-two".