51331451 has 4 divisors (see below), whose sum is σ = 51372504. Its totient is φ = 51290400.

The previous prime is 51331429. The next prime is 51331459. The reversal of 51331451 is 15413315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15413315 = 5 ⋅3082663.

It is a cyclic number.

It is not a de Polignac number, because 51331451 - 2¹⁰ = 51330427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51331459) 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, 18590 + ... + 21171.

It is an arithmetic number, because the mean of its divisors is an integer number (12843126).

Almost surely, 2^51331451 is an apocalyptic number.

51331451 is a deficient number, since it is larger than the sum of its proper divisors (41053).

51331451 is a wasteful number, since it uses less digits than its factorization.

51331451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41052.

The product of its digits is 900, while the sum is 23.

The square root of 51331451 is about 7164.5970577556. The cubic root of 51331451 is about 371.6446171462.

Adding to 51331451 its reverse (15413315), we get a palindrome (66744766).

The spelling of 51331451 in words is "fifty-one million, three hundred thirty-one thousand, four hundred fifty-one".