51254665 has 32 divisors (see below), whose sum is σ = 77865984. Its totient is φ = 31458240.

The previous prime is 51254663. The next prime is 51254669. The reversal of 51254665 is 56645215.

It is not a de Polignac number, because 51254665 - 2¹ = 51254663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51254665.

It is not an unprimeable number, because it can be changed into a prime (51254663) 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 31 ways as a sum of consecutive naturals, for example, 24802 + ... + 26788.

It is an arithmetic number, because the mean of its divisors is an integer number (2433312).

Almost surely, 2^51254665 is an apocalyptic number.

51254665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51254665 is a deficient number, since it is larger than the sum of its proper divisors (26611319).

51254665 is a wasteful number, since it uses less digits than its factorization.

51254665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077.

The product of its digits is 36000, while the sum is 34.

The square root of 51254665 is about 7159.2363419572. The cubic root of 51254665 is about 371.4592120045.

The spelling of 51254665 in words is "fifty-one million, two hundred fifty-four thousand, six hundred sixty-five".