31612217857 has 8 divisors (see below), whose sum is σ = 34494023232. Its totient is φ = 28731740400.

The previous prime is 31612217837. The next prime is 31612217863. The reversal of 31612217857 is 75871221613.

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

It is not a de Polignac number, because 31612217857 - 2¹⁹ = 31611693569 is a prime.

It is a super-3 number, since 3×31612217857³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31612217807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281869 + ... + 377722.

It is an arithmetic number, because the mean of its divisors is an integer number (4311752904).

Almost surely, 2^31612217857 is an apocalyptic number.

It is an amenable number.

31612217857 is a deficient number, since it is larger than the sum of its proper divisors (2881805375).

31612217857 is a wasteful number, since it uses less digits than its factorization.

31612217857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663959.

The product of its digits is 141120, while the sum is 43.

The spelling of 31612217857 in words is "thirty-one billion, six hundred twelve million, two hundred seventeen thousand, eight hundred fifty-seven".