52621551 has 24 divisors (see below), whose sum is σ = 78249600. Its totient is φ = 34057296.

The previous prime is 52621523. The next prime is 52621553. The reversal of 52621551 is 15512625.

52621551 is a `hidden beast` number, since 52 + 62 + 1 + 551 = 666.

It is not a de Polignac number, because 52621551 - 2⁶ = 52621487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52621553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87550 + ... + 88148.

It is an arithmetic number, because the mean of its divisors is an integer number (3260400).

Almost surely, 2^52621551 is an apocalyptic number.

52621551 is a deficient number, since it is larger than the sum of its proper divisors (25628049).

52621551 is a wasteful number, since it uses less digits than its factorization.

52621551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 872 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 52621551 is about 7254.0713395996. The cubic root of 52621551 is about 374.7323743828.

The spelling of 52621551 in words is "fifty-two million, six hundred twenty-one thousand, five hundred fifty-one".