51557001 has 8 divisors (see below), whose sum is σ = 68824224. Its totient is φ = 34330560.

The previous prime is 51556991. The next prime is 51557029. The reversal of 51557001 is 10075515.

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

It is not a de Polignac number, because 51557001 - 2⁹ = 51556489 is a prime.

It is a super-2 number, since 2×51557001² = 5316248704228002, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51557081) 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, 7111 + ... + 12396.

It is an arithmetic number, because the mean of its divisors is an integer number (8603028).

Almost surely, 2^51557001 is an apocalyptic number.

It is an amenable number.

51557001 is a deficient number, since it is larger than the sum of its proper divisors (17267223).

51557001 is a wasteful number, since it uses less digits than its factorization.

51557001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20391.

The product of its (nonzero) digits is 875, while the sum is 24.

The square root of 51557001 is about 7180.3203967511. The cubic root of 51557001 is about 372.1881563471.

The spelling of 51557001 in words is "fifty-one million, five hundred fifty-seven thousand, one".