52215651 has 8 divisors (see below), whose sum is σ = 77356560. Its totient is φ = 34810416.

The previous prime is 52215643. The next prime is 52215661. The reversal of 52215651 is 15651225.

52215651 is a `hidden beast` number, since 5 + 2 + 2 + 1 + 5 + 651 = 666.

It is not a de Polignac number, because 52215651 - 2³ = 52215643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1933913 = 52215651 / (5 + 2 + 2 + 1 + 5 + 6 + 5 + 1).

It is not an unprimeable number, because it can be changed into a prime (52215641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966930 + ... + 966983.

It is an arithmetic number, because the mean of its divisors is an integer number (9669570).

Almost surely, 2^52215651 is an apocalyptic number.

52215651 is a deficient number, since it is larger than the sum of its proper divisors (25140909).

52215651 is a wasteful number, since it uses less digits than its factorization.

52215651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1933922 (or 1933916 counting only the distinct ones).

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

The square root of 52215651 is about 7226.0397867712. The cubic root of 52215651 is about 373.7663782564.

Adding to 52215651 its reverse (15651225), we get a palindrome (67866876).

The spelling of 52215651 in words is "fifty-two million, two hundred fifteen thousand, six hundred fifty-one".