51517465 has 8 divisors (see below), whose sum is σ = 62087688. Its totient is φ = 41036160.

The previous prime is 51517457. The next prime is 51517471. The reversal of 51517465 is 56471515.

It can be written as a sum of positive squares in 4 ways, for example, as 11978521 + 39538944 = 3461^2 + 6288^2 .

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

It is not a de Polignac number, because 51517465 - 2³ = 51517457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51517465.

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, 20946 + ... + 23275.

It is an arithmetic number, because the mean of its divisors is an integer number (7760961).

Almost surely, 2^51517465 is an apocalyptic number.

It is an amenable number.

51517465 is a deficient number, since it is larger than the sum of its proper divisors (10570223).

51517465 is a wasteful number, since it uses less digits than its factorization.

51517465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44459.

The product of its digits is 21000, while the sum is 34.

The square root of 51517465 is about 7177.5667882647. The cubic root of 51517465 is about 372.0929956927.

The spelling of 51517465 in words is "fifty-one million, five hundred seventeen thousand, four hundred sixty-five".