51144765 has 16 divisors (see below), whose sum is σ = 93522048. Its totient is φ = 23380416.

The previous prime is 51144763. The next prime is 51144781. The reversal of 51144765 is 56744115.

It is not a de Polignac number, because 51144765 - 2¹ = 51144763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51144763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243442 + ... + 243651.

It is an arithmetic number, because the mean of its divisors is an integer number (5845128).

Almost surely, 2^51144765 is an apocalyptic number.

It is an amenable number.

51144765 is a deficient number, since it is larger than the sum of its proper divisors (42377283).

51144765 is a wasteful number, since it uses less digits than its factorization.

51144765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487108.

The product of its digits is 16800, while the sum is 33.

The square root of 51144765 is about 7151.5568235175. The cubic root of 51144765 is about 371.1935283511.

The spelling of 51144765 in words is "fifty-one million, one hundred forty-four thousand, seven hundred sixty-five".