31213213330 has 48 divisors (see below), whose sum is σ = 61034710464. Its totient is φ = 11487627840.

The previous prime is 31213213327. The next prime is 31213213349. The reversal of 31213213330 is 3331231213.

It is a super-3 number, since 3×31213213330³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 495897 + ... + 555283.

It is an arithmetic number, because the mean of its divisors is an integer number (1271556468).

Almost surely, 2^31213213330 is an apocalyptic number.

31213213330 is a deficient number, since it is larger than the sum of its proper divisors (29821497134).

31213213330 is a wasteful number, since it uses less digits than its factorization.

31213213330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59731 (or 59718 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31213213330 its reverse (3331231213), we get a palindrome (34544444543).

The spelling of 31213213330 in words is "thirty-one billion, two hundred thirteen million, two hundred thirteen thousand, three hundred thirty".