51512455 has 4 divisors (see below), whose sum is σ = 61814952. Its totient is φ = 41209960.

The previous prime is 51512453. The next prime is 51512459. The reversal of 51512455 is 55421515.

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

It is not a de Polignac number, because 51512455 - 2¹ = 51512453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51512453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5151241 + ... + 5151250.

It is an arithmetic number, because the mean of its divisors is an integer number (15453738).

Almost surely, 2^51512455 is an apocalyptic number.

51512455 is a deficient number, since it is larger than the sum of its proper divisors (10302497).

51512455 is a wasteful number, since it uses less digits than its factorization.

51512455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10302496.

The product of its digits is 5000, while the sum is 28.

The square root of 51512455 is about 7177.2177757123. The cubic root of 51512455 is about 372.0809334639.

The spelling of 51512455 in words is "fifty-one million, five hundred twelve thousand, four hundred fifty-five".