65624253 has 4 divisors (see below), whose sum is σ = 87499008. Its totient is φ = 43749500.

The previous prime is 65624249. The next prime is 65624257. The reversal of 65624253 is 35242656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (65624249) and next prime (65624257).

It is a cyclic number.

It is not a de Polignac number, because 65624253 - 2² = 65624249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65624257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10937373 + ... + 10937378.

It is an arithmetic number, because the mean of its divisors is an integer number (21874752).

Almost surely, 2^65624253 is an apocalyptic number.

It is an amenable number.

65624253 is a deficient number, since it is larger than the sum of its proper divisors (21874755).

65624253 is a wasteful number, since it uses less digits than its factorization.

65624253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21874754.

The product of its digits is 43200, while the sum is 33.

The square root of 65624253 is about 8100.8797670377. The cubic root of 65624253 is about 403.3556310480.

The spelling of 65624253 in words is "sixty-five million, six hundred twenty-four thousand, two hundred fifty-three".