52649961 has 24 divisors (see below), whose sum is σ = 87945984. Its totient is φ = 27770400.

The previous prime is 52649959. The next prime is 52649981. The reversal of 52649961 is 16994625.

It is a happy number.

It is not a de Polignac number, because 52649961 - 2¹ = 52649959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52649911) 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, 11865 + ... + 15686.

It is an arithmetic number, because the mean of its divisors is an integer number (3664416).

Almost surely, 2^52649961 is an apocalyptic number.

It is an amenable number.

52649961 is a deficient number, since it is larger than the sum of its proper divisors (35296023).

52649961 is a wasteful number, since it uses less digits than its factorization.

52649961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27581 (or 27574 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 52649961 is about 7256.0292860489. The cubic root of 52649961 is about 374.7998006952.

It can be divided in two parts, 5264 and 9961, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 52649961 in words is "fifty-two million, six hundred forty-nine thousand, nine hundred sixty-one".