51557377 has 8 divisors (see below), whose sum is σ = 53061120. Its totient is φ = 50065440.

The previous prime is 51557357. The next prime is 51557399. The reversal of 51557377 is 77375515.

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

It is a cyclic number.

It is not a de Polignac number, because 51557377 - 2⁷ = 51557249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51557357) 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, 6324 + ... + 11962.

It is an arithmetic number, because the mean of its divisors is an integer number (6632640).

Almost surely, 2^51557377 is an apocalyptic number.

It is an amenable number.

51557377 is a deficient number, since it is larger than the sum of its proper divisors (1503743).

51557377 is a wasteful number, since it uses less digits than its factorization.

51557377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903.

The product of its digits is 128625, while the sum is 40.

The square root of 51557377 is about 7180.3465793790. The cubic root of 51557377 is about 372.1890611218.

The spelling of 51557377 in words is "fifty-one million, five hundred fifty-seven thousand, three hundred seventy-seven".