331745620 has 12 divisors (see below), whose sum is σ = 696665844. Its totient is φ = 132698240.

The previous prime is 331745611. The next prime is 331745639. The reversal of 331745620 is 26547133.

331745620 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 73307844 + 258437776 = 8562^2 + 16076^2 .

It is a super-2 number, since 2×331745620² = 220110312778368800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8293621 + ... + 8293660.

It is an arithmetic number, because the mean of its divisors is an integer number (58055487).

Almost surely, 2^331745620 is an apocalyptic number.

It is an amenable number.

331745620 is an abundant number, since it is smaller than the sum of its proper divisors (364920224).

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

331745620 is a wasteful number, since it uses less digits than its factorization.

331745620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16587290 (or 16587288 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 331745620 is about 18213.8853625469. The cubic root of 331745620 is about 692.2586629222.

The spelling of 331745620 in words is "three hundred thirty-one million, seven hundred forty-five thousand, six hundred twenty".