51765425 has 18 divisors (see below), whose sum is σ = 68160258. Its totient is φ = 38864640.

The previous prime is 51765409. The next prime is 51765437. The reversal of 51765425 is 52456715.

It can be written as a sum of positive squares in 9 ways, for example, as 1056784 + 50708641 = 1028^2 + 7121^2 .

It is not a de Polignac number, because 51765425 - 2⁴ = 51765409 is a prime.

It is a super-3 number, since 3×51765425³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 148151 + ... + 148499.

It is an arithmetic number, because the mean of its divisors is an integer number (3786681).

Almost surely, 2^51765425 is an apocalyptic number.

It is an amenable number.

51765425 is a deficient number, since it is larger than the sum of its proper divisors (16394833).

51765425 is an equidigital number, since it uses as much as digits as its factorization.

51765425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 371 counting only the distinct ones).

The product of its digits is 42000, while the sum is 35.

The square root of 51765425 is about 7194.8193167028. The cubic root of 51765425 is about 372.6890171741.

It can be divided in two parts, 5176 and 5425, that added together give a palindrome (10601).

The spelling of 51765425 in words is "fifty-one million, seven hundred sixty-five thousand, four hundred twenty-five".