51765545 has 12 divisors (see below), whose sum is σ = 67265676. Its totient is φ = 38226240.

The previous prime is 51765533. The next prime is 51765599. The reversal of 51765545 is 54556715.

It can be written as a sum of positive squares in 6 ways, for example, as 17799961 + 33965584 = 4219^2 + 5828^2 .

It is not a de Polignac number, because 51765545 - 2⁴ = 51765529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51765499 and 51765508.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29786 + ... + 31475.

It is an arithmetic number, because the mean of its divisors is an integer number (5605473).

Almost surely, 2^51765545 is an apocalyptic number.

It is an amenable number.

51765545 is a deficient number, since it is larger than the sum of its proper divisors (15500131).

51765545 is a wasteful number, since it uses less digits than its factorization.

51765545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61292 (or 61279 counting only the distinct ones).

The product of its digits is 105000, while the sum is 38.

The square root of 51765545 is about 7194.8276560318. The cubic root of 51765545 is about 372.6893051568.

The spelling of 51765545 in words is "fifty-one million, seven hundred sixty-five thousand, five hundred forty-five".