51255077 has 4 divisors (see below), whose sum is σ = 51298956. Its totient is φ = 51211200.

The previous prime is 51255053. The next prime is 51255133. The reversal of 51255077 is 77055215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77055215 = 5 ⋅15411043.

It can be written as a sum of positive squares in 2 ways, for example, as 9897316 + 41357761 = 3146^2 + 6431^2 .

It is a cyclic number.

It is not a de Polignac number, because 51255077 - 2⁸ = 51254821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51255047) 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, 20138 + ... + 22539.

It is an arithmetic number, because the mean of its divisors is an integer number (12824739).

Almost surely, 2^51255077 is an apocalyptic number.

It is an amenable number.

51255077 is a deficient number, since it is larger than the sum of its proper divisors (43879).

51255077 is a wasteful number, since it uses less digits than its factorization.

51255077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43878.

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 51255077 is about 7159.2651159180. The cubic root of 51255077 is about 371.4602073012.

The spelling of 51255077 in words is "fifty-one million, two hundred fifty-five thousand, seventy-seven".