331727540 has 12 divisors (see below), whose sum is σ = 696627876. Its totient is φ = 132691008.

The previous prime is 331727537. The next prime is 331727563. The reversal of 331727540 is 45727133.

It can be written as a sum of positive squares in 2 ways, for example, as 108284836 + 223442704 = 10406^2 + 14948^2 .

It is a super-2 number, since 2×331727540² = 220086321588903200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 331727497 and 331727506.

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, 8293169 + ... + 8293208.

It is an arithmetic number, because the mean of its divisors is an integer number (58052323).

Almost surely, 2^331727540 is an apocalyptic number.

It is an amenable number.

331727540 is an abundant number, since it is smaller than the sum of its proper divisors (364900336).

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

331727540 is a wasteful number, since it uses less digits than its factorization.

331727540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16586386 (or 16586384 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 331727540 is about 18213.3890311496. The cubic root of 331727540 is about 692.2460867562.

The spelling of 331727540 in words is "three hundred thirty-one million, seven hundred twenty-seven thousand, five hundred forty".