51077257 has 24 divisors (see below), whose sum is σ = 65286432. Its totient is φ = 39513600.

The previous prime is 51077251. The next prime is 51077261. The reversal of 51077257 is 75277015.

It is a de Polignac number, because none of the positive numbers 2^k-51077257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51077251) 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, 103782 + ... + 104272.

It is an arithmetic number, because the mean of its divisors is an integer number (2720268).

Almost surely, 2^51077257 is an apocalyptic number.

It is an amenable number.

51077257 is a deficient number, since it is larger than the sum of its proper divisors (14209175).

51077257 is a wasteful number, since it uses less digits than its factorization.

51077257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 51077257 is about 7146.8354535417. The cubic root of 51077257 is about 371.0301387643.

The spelling of 51077257 in words is "fifty-one million, seventy-seven thousand, two hundred fifty-seven".