3121213608 has 64 divisors (see below), whose sum is σ = 8683948800. Its totient is φ = 1038735360.

The previous prime is 3121213541. The next prime is 3121213621. The reversal of 3121213608 is 8063121213.

It is a happy number.

3121213608 is a `hidden beast` number, since 31 + 2 + 1 + 21 + 3 + 608 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127185 + ... + 149727.

It is an arithmetic number, because the mean of its divisors is an integer number (135686700).

Almost surely, 2^3121213608 is an apocalyptic number.

It is an amenable number.

3121213608 is an abundant number, since it is smaller than the sum of its proper divisors (5562735192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121213608 is a wasteful number, since it uses less digits than its factorization.

3121213608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23199 (or 23189 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 3121213608 is about 55867.8226531158. The cubic root of 3121213608 is about 1461.4181516690.

The spelling of 3121213608 in words is "three billion, one hundred twenty-one million, two hundred thirteen thousand, six hundred eight".