51553571 has 8 divisors (see below), whose sum is σ = 54981360. Its totient is φ = 48169728.

The previous prime is 51553559. The next prime is 51553573. The reversal of 51553571 is 17535515.

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 51553571 - 2⁶ = 51553507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51553573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8546 + ... + 13271.

It is an arithmetic number, because the mean of its divisors is an integer number (6872670).

Almost surely, 2^51553571 is an apocalyptic number.

51553571 is a deficient number, since it is larger than the sum of its proper divisors (3427789).

51553571 is a wasteful number, since it uses less digits than its factorization.

51553571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21973.

The product of its digits is 13125, while the sum is 32.

The square root of 51553571 is about 7180.0815454979. The cubic root of 51553571 is about 372.1799024814.

The spelling of 51553571 in words is "fifty-one million, five hundred fifty-three thousand, five hundred seventy-one".