51515045 has 8 divisors (see below), whose sum is σ = 61889400. Its totient is φ = 41164480.

The previous prime is 51515033. The next prime is 51515047. The reversal of 51515045 is 54051515.

It can be written as a sum of positive squares in 4 ways, for example, as 564001 + 50951044 = 751^2 + 7138^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51515045 - 2⁸ = 51514789 is a prime.

It is a super-2 number, since 2×51515045² = 5307599722704050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770 + ... + 10179.

It is an arithmetic number, because the mean of its divisors is an integer number (7736175).

Almost surely, 2^51515045 is an apocalyptic number.

It is an amenable number.

51515045 is a deficient number, since it is larger than the sum of its proper divisors (10374355).

51515045 is a wasteful number, since it uses less digits than its factorization.

51515045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11895.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 51515045 is about 7177.3982054781. The cubic root of 51515045 is about 372.0871693245.

The spelling of 51515045 in words is "fifty-one million, five hundred fifteen thousand, forty-five".