51461893 has 4 divisors (see below), whose sum is σ = 58813600. Its totient is φ = 44110188.

The previous prime is 51461881. The next prime is 51461903. The reversal of 51461893 is 39816415.

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 not a de Polignac number, because 51461893 - 2¹⁷ = 51330821 is a prime.

It is a super-2 number, since 2×51461893² = 5296652862286898, 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 (51461093) 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, 3675843 + ... + 3675856.

It is an arithmetic number, because the mean of its divisors is an integer number (14703400).

Almost surely, 2^51461893 is an apocalyptic number.

It is an amenable number.

51461893 is a deficient number, since it is larger than the sum of its proper divisors (7351707).

51461893 is an equidigital number, since it uses as much as digits as its factorization.

51461893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7351706.

The product of its digits is 25920, while the sum is 37.

The square root of 51461893 is about 7173.6945153805. The cubic root of 51461893 is about 371.9591550522.

The spelling of 51461893 in words is "fifty-one million, four hundred sixty-one thousand, eight hundred ninety-three".