31213044078 has 32 divisors (see below), whose sum is σ = 65435876352. Its totient is φ = 9914520000.

The previous prime is 31213044073. The next prime is 31213044103. The reversal of 31213044078 is 87044031213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213044073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1464798 + ... + 1485953.

It is an arithmetic number, because the mean of its divisors is an integer number (2044871136).

Almost surely, 2^31213044078 is an apocalyptic number.

31213044078 is an abundant number, since it is smaller than the sum of its proper divisors (34222832274).

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

31213044078 is a wasteful number, since it uses less digits than its factorization.

31213044078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950840.

The product of its (nonzero) digits is 16128, while the sum is 33.

The spelling of 31213044078 in words is "thirty-one billion, two hundred thirteen million, forty-four thousand, seventy-eight".