51612659 has 4 divisors (see below), whose sum is σ = 58985904. Its totient is φ = 44239416.

The previous prime is 51612653. The next prime is 51612661. The reversal of 51612659 is 95621615.

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

It is a cyclic number.

It is not a de Polignac number, because 51612659 - 2⁸ = 51612403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51612653) 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, 3686612 + ... + 3686625.

It is an arithmetic number, because the mean of its divisors is an integer number (14746476).

Almost surely, 2^51612659 is an apocalyptic number.

51612659 is a deficient number, since it is larger than the sum of its proper divisors (7373245).

51612659 is an equidigital number, since it uses as much as digits as its factorization.

51612659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7373244.

The product of its digits is 16200, while the sum is 35.

The square root of 51612659 is about 7184.1950836541. The cubic root of 51612659 is about 372.3220392219.

The spelling of 51612659 in words is "fifty-one million, six hundred twelve thousand, six hundred fifty-nine".