51840577 has 4 divisors (see below), whose sum is σ = 52943616. Its totient is φ = 50737540.

The previous prime is 51840571. The next prime is 51840601. The reversal of 51840577 is 77504815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51840577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51840571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551449 + ... + 551542.

It is an arithmetic number, because the mean of its divisors is an integer number (13235904).

Almost surely, 2^51840577 is an apocalyptic number.

It is an amenable number.

51840577 is a deficient number, since it is larger than the sum of its proper divisors (1103039).

51840577 is a wasteful number, since it uses less digits than its factorization.

51840577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103038.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 51840577 is about 7200.0400693329. The cubic root of 51840577 is about 372.8692840991.

The spelling of 51840577 in words is "fifty-one million, eight hundred forty thousand, five hundred seventy-seven".