52721090 has 16 divisors (see below), whose sum is σ = 95006520. Its totient is φ = 21064320.

The previous prime is 52721077. The next prime is 52721107. The reversal of 52721090 is 9012725.

It can be written as a sum of positive squares in 4 ways, for example, as 38651089 + 14070001 = 6217^2 + 3751^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8126 + ... + 13094.

Almost surely, 2^52721090 is an apocalyptic number.

52721090 is a deficient number, since it is larger than the sum of its proper divisors (42285430).

52721090 is a wasteful number, since it uses less digits than its factorization.

52721090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6037.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 52721090 is about 7260.9290039223. The cubic root of 52721090 is about 374.9685069849.

The spelling of 52721090 in words is "fifty-two million, seven hundred twenty-one thousand, ninety".