51349557 has 8 divisors (see below), whose sum is σ = 78246976. Its totient is φ = 29342592.

The previous prime is 51349549. The next prime is 51349559. The reversal of 51349557 is 75594315.

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

It is not a de Polignac number, because 51349557 - 2³ = 51349549 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 (51349559) 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, 1222588 + ... + 1222629.

It is an arithmetic number, because the mean of its divisors is an integer number (9780872).

Almost surely, 2^51349557 is an apocalyptic number.

It is an amenable number.

51349557 is a deficient number, since it is larger than the sum of its proper divisors (26897419).

51349557 is a wasteful number, since it uses less digits than its factorization.

51349557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445227.

The product of its digits is 94500, while the sum is 39.

The square root of 51349557 is about 7165.8605205516. The cubic root of 51349557 is about 371.6883084004.

The spelling of 51349557 in words is "fifty-one million, three hundred forty-nine thousand, five hundred fifty-seven".