652722381 has 30 divisors (see below), whose sum is σ = 985110126. Its totient is φ = 430693200.

The previous prime is 652722379. The next prime is 652722397. The reversal of 652722381 is 183227256.

652722381 is a `hidden beast` number, since 6 + 5 + 272 + 2 + 381 = 666.

It can be written as a sum of positive squares in only one way, i.e., 360620100 + 292102281 = 18990^2 + 17091^2 .

It is not a de Polignac number, because 652722381 - 2¹ = 652722379 is a prime.

It is a super-2 number, since 2×652722381² = 852093013316618322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652722311) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3093366 + ... + 3093576.

Almost surely, 2^652722381 is an apocalyptic number.

It is an amenable number.

652722381 is a deficient number, since it is larger than the sum of its proper divisors (332387745).

652722381 is an equidigital number, since it uses as much as digits as its factorization.

652722381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 395 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 652722381 is about 25548.4320653930. The cubic root of 652722381 is about 867.4467710892.

The spelling of 652722381 in words is "six hundred fifty-two million, seven hundred twenty-two thousand, three hundred eighty-one".