51765601 has 4 divisors (see below), whose sum is σ = 51793812. Its totient is φ = 51737392.

The previous prime is 51765599. The next prime is 51765613. The reversal of 51765601 is 10656715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8994001 + 42771600 = 2999^2 + 6540^2 .

It is a cyclic number.

It is not a de Polignac number, because 51765601 - 2¹ = 51765599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51765641) 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, 11146 + ... + 15091.

It is an arithmetic number, because the mean of its divisors is an integer number (12948453).

Almost surely, 2^51765601 is an apocalyptic number.

It is an amenable number.

51765601 is a deficient number, since it is larger than the sum of its proper divisors (28211).

51765601 is a wasteful number, since it uses less digits than its factorization.

51765601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28210.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 51765601 is about 7194.8315477153. The cubic root of 51765601 is about 372.6894395486.

The spelling of 51765601 in words is "fifty-one million, seven hundred sixty-five thousand, six hundred one".