51331022 has 4 divisors (see below), whose sum is σ = 76996536. Its totient is φ = 25665510.

The previous prime is 51331019. The next prime is 51331051. The reversal of 51331022 is 22013315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22013315 = 5 ⋅4402663.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12832754 + ... + 12832757.

It is an arithmetic number, because the mean of its divisors is an integer number (19249134).

Almost surely, 2^51331022 is an apocalyptic number.

51331022 is a deficient number, since it is larger than the sum of its proper divisors (25665514).

51331022 is a wasteful number, since it uses less digits than its factorization.

51331022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25665513.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 51331022 is about 7164.5671188146. The cubic root of 51331022 is about 371.6435818096.

Adding to 51331022 its reverse (22013315), we get a palindrome (73344337).

The spelling of 51331022 in words is "fifty-one million, three hundred thirty-one thousand, twenty-two".