51162215 has 24 divisors (see below), whose sum is σ = 67039488. Its totient is φ = 37464960.

The previous prime is 51162211. The next prime is 51162227. The reversal of 51162215 is 51226115.

It is a happy number.

51162215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51162215 - 2² = 51162211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51162211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161237 + ... + 161553.

It is an arithmetic number, because the mean of its divisors is an integer number (2793312).

Almost surely, 2^51162215 is an apocalyptic number.

51162215 is a deficient number, since it is larger than the sum of its proper divisors (15877273).

51162215 is a wasteful number, since it uses less digits than its factorization.

51162215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 526 counting only the distinct ones).

The product of its digits is 600, while the sum is 23.

The square root of 51162215 is about 7152.7767335490. The cubic root of 51162215 is about 371.2357391915.

It can be divided in two parts, 511 and 62215, that added together give a palindrome (62726).

The spelling of 51162215 in words is "fifty-one million, one hundred sixty-two thousand, two hundred fifteen".