51325557 has 8 divisors (see below), whose sum is σ = 68561376. Its totient is φ = 34153392.

The previous prime is 51325523. The next prime is 51325559. The reversal of 51325557 is 75552315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51325557 - 2⁸ = 51325301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51325559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13998 + ... + 17279.

It is an arithmetic number, because the mean of its divisors is an integer number (8570172).

Almost surely, 2^51325557 is an apocalyptic number.

It is an amenable number.

51325557 is a deficient number, since it is larger than the sum of its proper divisors (17235819).

51325557 is a wasteful number, since it uses less digits than its factorization.

51325557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31827.

The product of its digits is 26250, while the sum is 33.

The square root of 51325557 is about 7164.1857178608. The cubic root of 51325557 is about 371.6303922270.

The spelling of 51325557 in words is "fifty-one million, three hundred twenty-five thousand, five hundred fifty-seven".