51415553 has 6 divisors (see below), whose sum is σ = 59809986. Its totient is φ = 44070432.

The previous prime is 51415547. The next prime is 51415561. The reversal of 51415553 is 35551415.

It can be written as a sum of positive squares in only one way, i.e., 46676224 + 4739329 = 6832^2 + 2177^2 .

It is not a de Polignac number, because 51415553 - 2⁶ = 51415489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51415513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 524600 + ... + 524697.

It is an arithmetic number, because the mean of its divisors is an integer number (9968331).

Almost surely, 2^51415553 is an apocalyptic number.

It is an amenable number.

51415553 is a deficient number, since it is larger than the sum of its proper divisors (8394433).

51415553 is a wasteful number, since it uses less digits than its factorization.

51415553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049311 (or 1049304 counting only the distinct ones).

The product of its digits is 7500, while the sum is 29.

The square root of 51415553 is about 7170.4639319921. The cubic root of 51415553 is about 371.8474752407.

Adding to 51415553 its reverse (35551415), we get a palindrome (86966968).

The spelling of 51415553 in words is "fifty-one million, four hundred fifteen thousand, five hundred fifty-three".