51822515 has 4 divisors (see below), whose sum is σ = 62187024. Its totient is φ = 41458008.

The previous prime is 51822503. The next prime is 51822527. The reversal of 51822515 is 51522815.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51822503) and next prime (51822527).

It is a cyclic number.

It is not a de Polignac number, because 51822515 - 2⁶ = 51822451 is a prime.

It is a Duffinian 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 in 3 ways as a sum of consecutive naturals, for example, 5182247 + ... + 5182256.

It is an arithmetic number, because the mean of its divisors is an integer number (15546756).

Almost surely, 2^51822515 is an apocalyptic number.

51822515 is a deficient number, since it is larger than the sum of its proper divisors (10364509).

51822515 is a wasteful number, since it uses less digits than its factorization.

51822515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10364508.

The product of its digits is 4000, while the sum is 29.

The square root of 51822515 is about 7198.7856614849. The cubic root of 51822515 is about 372.8259747347.

The spelling of 51822515 in words is "fifty-one million, eight hundred twenty-two thousand, five hundred fifteen".