51242553 has 6 divisors (see below), whose sum is σ = 74017034. Its totient is φ = 34161696.

The previous prime is 51242533. The next prime is 51242561. The reversal of 51242553 is 35524215.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 29452329 + 21790224 = 5427^2 + 4668^2 .

It is not a de Polignac number, because 51242553 - 2¹⁰ = 51241529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51242533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2846800 + ... + 2846817.

Almost surely, 2^51242553 is an apocalyptic number.

It is an amenable number.

51242553 is a deficient number, since it is larger than the sum of its proper divisors (22774481).

51242553 is a wasteful number, since it uses less digits than its factorization.

51242553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5693623 (or 5693620 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 51242553 is about 7158.3903917012. The cubic root of 51242553 is about 371.4299498329.

Adding to 51242553 its reverse (35524215), we get a palindrome (86766768).

The spelling of 51242553 in words is "fifty-one million, two hundred forty-two thousand, five hundred fifty-three".