51577231 has 4 divisors (see below), whose sum is σ = 51592464. Its totient is φ = 51562000.

The previous prime is 51577213. The next prime is 51577241. The reversal of 51577231 is 13277515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51577231 - 2⁵ = 51577199 is a prime.

It is a super-2 number, since 2×51577231² = 5320421515254722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51577193 and 51577202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51577241) 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 3 ways as a sum of consecutive naturals, for example, 6 + ... + 10156.

It is an arithmetic number, because the mean of its divisors is an integer number (12898116).

Almost surely, 2^51577231 is an apocalyptic number.

51577231 is a deficient number, since it is larger than the sum of its proper divisors (15233).

51577231 is a wasteful number, since it uses less digits than its factorization.

51577231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15232.

The product of its digits is 7350, while the sum is 31.

The square root of 51577231 is about 7181.7289701018. The cubic root of 51577231 is about 372.2368298649.

The spelling of 51577231 in words is "fifty-one million, five hundred seventy-seven thousand, two hundred thirty-one".