51245522 has 4 divisors (see below), whose sum is σ = 76868286. Its totient is φ = 25622760.

The previous prime is 51245521. The next prime is 51245533. The reversal of 51245522 is 22554215.

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

It can be written as a sum of positive squares in only one way, i.e., 48846121 + 2399401 = 6989^2 + 1549^2 .

It is a super-2 number, since 2×51245522² = 5252207050104968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51245491 and 51245500.

It is not an unprimeable number, because it can be changed into a prime (51245521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12811379 + ... + 12811382.

Almost surely, 2^51245522 is an apocalyptic number.

51245522 is a deficient number, since it is larger than the sum of its proper divisors (25622764).

51245522 is a wasteful number, since it uses less digits than its factorization.

51245522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25622763.

The product of its digits is 4000, while the sum is 26.

The square root of 51245522 is about 7158.5977677196. The cubic root of 51245522 is about 371.4371232604.

Adding to 51245522 its reverse (22554215), we get a palindrome (73799737).

The spelling of 51245522 in words is "fifty-one million, two hundred forty-five thousand, five hundred twenty-two".