315721652 has 12 divisors (see below), whose sum is σ = 565362336. Its totient is φ = 154189560.

The previous prime is 315721643. The next prime is 315721669. The reversal of 315721652 is 256127513.

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, 917624 + ... + 917967.

It is an arithmetic number, because the mean of its divisors is an integer number (47113528).

Almost surely, 2^315721652 is an apocalyptic number.

It is an amenable number.

315721652 is a deficient number, since it is larger than the sum of its proper divisors (249640684).

315721652 is a wasteful number, since it uses less digits than its factorization.

315721652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835638 (or 1835636 counting only the distinct ones).

The product of its digits is 12600, while the sum is 32.

The square root of 315721652 is about 17768.5579606225. The cubic root of 315721652 is about 680.9284117827.

The spelling of 315721652 in words is "three hundred fifteen million, seven hundred twenty-one thousand, six hundred fifty-two".