51365825 has 24 divisors (see below), whose sum is σ = 74578560. Its totient is φ = 34358400.

The previous prime is 51365807. The next prime is 51365827. The reversal of 51365825 is 52856315.

It is not a de Polignac number, because 51365825 - 2¹⁰ = 51364801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (51365827) 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, 3596 + ... + 10754.

It is an arithmetic number, because the mean of its divisors is an integer number (3107440).

Almost surely, 2^51365825 is an apocalyptic number.

It is an amenable number.

51365825 is a deficient number, since it is larger than the sum of its proper divisors (23212735).

51365825 is a wasteful number, since it uses less digits than its factorization.

51365825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7217 (or 7212 counting only the distinct ones).

The product of its digits is 36000, while the sum is 35.

The square root of 51365825 is about 7166.9955350900. The cubic root of 51365825 is about 371.7275556521.

The spelling of 51365825 in words is "fifty-one million, three hundred sixty-five thousand, eight hundred twenty-five".