31214590021 has 8 divisors (see below), whose sum is σ = 32862142080. Its totient is φ = 29567505888.

The previous prime is 31214590013. The next prime is 31214590031. The reversal of 31214590021 is 12009541213.

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

It is a cyclic number.

It is not a de Polignac number, because 31214590021 - 2³ = 31214590013 is a prime.

It is a super-2 number, since 2×31214590021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31214590031) 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, 24345 + ... + 251041.

It is an arithmetic number, because the mean of its divisors is an integer number (4107767760).

Almost surely, 2^31214590021 is an apocalyptic number.

It is an amenable number.

31214590021 is a deficient number, since it is larger than the sum of its proper divisors (1647552059).

31214590021 is a wasteful number, since it uses less digits than its factorization.

31214590021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233963.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 31214590021 in words is "thirty-one billion, two hundred fourteen million, five hundred ninety thousand, twenty-one".