31212513153 has 24 divisors (see below), whose sum is σ = 48143896320. Its totient is φ = 19442717280.

The previous prime is 31212513151. The next prime is 31212513161. The reversal of 31212513153 is 35131521213.

It is not a de Polignac number, because 31212513153 - 2¹ = 31212513151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31212513151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1920751 + ... + 1936932.

It is an arithmetic number, because the mean of its divisors is an integer number (2005995680).

Almost surely, 2^31212513153 is an apocalyptic number.

It is an amenable number.

31212513153 is a deficient number, since it is larger than the sum of its proper divisors (16931383167).

31212513153 is a wasteful number, since it uses less digits than its factorization.

31212513153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857749 (or 3857746 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The spelling of 31212513153 in words is "thirty-one billion, two hundred twelve million, five hundred thirteen thousand, one hundred fifty-three".