51731461 has 4 divisors (see below), whose sum is σ = 51922624. Its totient is φ = 51540300.

The previous prime is 51731411. The next prime is 51731497. The reversal of 51731461 is 16413715.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16413715 = 5 ⋅3282743.

It is a cyclic number.

It is not a de Polignac number, because 51731461 - 2²³ = 43342853 is a prime.

It is a super-2 number, since 2×51731461² = 5352288114389042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51731411) 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, 95175 + ... + 95716.

It is an arithmetic number, because the mean of its divisors is an integer number (12980656).

Almost surely, 2^51731461 is an apocalyptic number.

It is an amenable number.

51731461 is a deficient number, since it is larger than the sum of its proper divisors (191163).

51731461 is a wasteful number, since it uses less digits than its factorization.

51731461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191162.

The product of its digits is 2520, while the sum is 28.

The square root of 51731461 is about 7192.4586199713. The cubic root of 51731461 is about 372.6074905621.

The spelling of 51731461 in words is "fifty-one million, seven hundred thirty-one thousand, four hundred sixty-one".