31300021231 has 8 divisors (see below), whose sum is σ = 31346162064. Its totient is φ = 31253913600.

The previous prime is 31300021211. The next prime is 31300021243. The reversal of 31300021231 is 13212000313.

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 31300021231 - 2²¹ = 31297924079 is a prime.

It is a super-2 number, since 2×31300021231² (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 (31300021211) 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, 2344431 + ... + 2357743.

It is an arithmetic number, because the mean of its divisors is an integer number (3918270258).

Almost surely, 2^31300021231 is an apocalyptic number.

31300021231 is a deficient number, since it is larger than the sum of its proper divisors (46140833).

31300021231 is a wasteful number, since it uses less digits than its factorization.

31300021231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16601.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31300021231 its reverse (13212000313), we get a palindrome (44512021544).

The spelling of 31300021231 in words is "thirty-one billion, three hundred million, twenty-one thousand, two hundred thirty-one".