51125522 has 16 divisors (see below), whose sum is σ = 89433600. Its totient is φ = 21910644.

The previous prime is 51125497. The next prime is 51125533. The reversal of 51125522 is 22552115.

It is a super-2 number, since 2×51125522² = 5227637999544968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36578 + ... + 37949.

It is an arithmetic number, because the mean of its divisors is an integer number (5589600).

Almost surely, 2^51125522 is an apocalyptic number.

51125522 is a deficient number, since it is larger than the sum of its proper divisors (38308078).

51125522 is an equidigital number, since it uses as much as digits as its factorization.

51125522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74550 (or 74536 counting only the distinct ones).

The product of its digits is 1000, while the sum is 23.

The square root of 51125522 is about 7150.2113255484. The cubic root of 51125522 is about 371.1469691833.

Adding to 51125522 its reverse (22552115), we get a palindrome (73677637).

The spelling of 51125522 in words is "fifty-one million, one hundred twenty-five thousand, five hundred twenty-two".