51422331 has 16 divisors (see below), whose sum is σ = 73418400. Its totient is φ = 31899648.

The previous prime is 51422321. The next prime is 51422333. The reversal of 51422331 is 13322415.

It is not a de Polignac number, because 51422331 - 2¹⁴ = 51405947 is a prime.

It is a super-2 number, since 2×51422331² = 5288512250947122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51422298 and 51422307.

It is not an unprimeable number, because it can be changed into a prime (51422333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1126 + ... + 10203.

It is an arithmetic number, because the mean of its divisors is an integer number (4588650).

Almost surely, 2^51422331 is an apocalyptic number.

51422331 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51422331 is a deficient number, since it is larger than the sum of its proper divisors (21996069).

51422331 is a wasteful number, since it uses less digits than its factorization.

51422331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11438.

The product of its digits is 720, while the sum is 21.

The square root of 51422331 is about 7170.9365497123. The cubic root of 51422331 is about 371.8638144695.

Adding to 51422331 its reverse (13322415), we get a palindrome (64744746).

It can be divided in two parts, 51 and 422331, that multiplied together give a square (21538881 = 4641²).

The spelling of 51422331 in words is "fifty-one million, four hundred twenty-two thousand, three hundred thirty-one".