51411431 has 4 divisors (see below), whose sum is σ = 52381512. Its totient is φ = 50441352.

The previous prime is 51411427. The next prime is 51411439. The reversal of 51411431 is 13411415.

It is a happy number.

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 51411431 - 2² = 51411427 is a prime.

It is a super-2 number, since 2×51411431² = 5286270474935522, 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 (51411439) 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, 484961 + ... + 485066.

It is an arithmetic number, because the mean of its divisors is an integer number (13095378).

Almost surely, 2^51411431 is an apocalyptic number.

51411431 is a deficient number, since it is larger than the sum of its proper divisors (970081).

51411431 is an equidigital number, since it uses as much as digits as its factorization.

51411431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970080.

The product of its digits is 240, while the sum is 20.

The square root of 51411431 is about 7170.1764971303. The cubic root of 51411431 is about 371.8375379347.

Adding to 51411431 its reverse (13411415), we get a palindrome (64822846).

The spelling of 51411431 in words is "fifty-one million, four hundred eleven thousand, four hundred thirty-one".