51512945 has 8 divisors (see below), whose sum is σ = 67435200. Its totient is φ = 37463920.

The previous prime is 51512927. The next prime is 51512957. The reversal of 51512945 is 54921515.

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

It is a de Polignac number, because none of the positive numbers 2^k-51512945 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468245 + ... + 468354.

It is an arithmetic number, because the mean of its divisors is an integer number (8429400).

Almost surely, 2^51512945 is an apocalyptic number.

51512945 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51512945 is a deficient number, since it is larger than the sum of its proper divisors (15922255).

51512945 is a wasteful number, since it uses less digits than its factorization.

51512945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936615.

The product of its digits is 9000, while the sum is 32.

The square root of 51512945 is about 7177.2519114213. The cubic root of 51512945 is about 372.0821132374.

The spelling of 51512945 in words is "fifty-one million, five hundred twelve thousand, nine hundred forty-five".