31213044069 has 16 divisors (see below), whose sum is σ = 42276862080. Its totient is φ = 20479979520.

The previous prime is 31213044053. The next prime is 31213044073. The reversal of 31213044069 is 96044031213.

It is not a de Polignac number, because 31213044069 - 2⁴ = 31213044053 is a prime.

It is a super-2 number, since 2×31213044069² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213044019) 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, 4084 + ... + 249885.

It is an arithmetic number, because the mean of its divisors is an integer number (2642303880).

Almost surely, 2^31213044069 is an apocalyptic number.

It is an amenable number.

31213044069 is a deficient number, since it is larger than the sum of its proper divisors (11063818011).

31213044069 is a wasteful number, since it uses less digits than its factorization.

31213044069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254620.

The product of its (nonzero) digits is 15552, while the sum is 33.

The spelling of 31213044069 in words is "thirty-one billion, two hundred thirteen million, forty-four thousand, sixty-nine".