51415505 has 8 divisors (see below), whose sum is σ = 61770600. Its totient is φ = 41084416.

The previous prime is 51415493. The next prime is 51415513. The reversal of 51415505 is 50551415.

It can be written as a sum of positive squares in 4 ways, for example, as 2876416 + 48539089 = 1696^2 + 6967^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51415505 - 2⁴ = 51415489 is a prime.

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, 890 + ... + 10179.

It is an arithmetic number, because the mean of its divisors is an integer number (7721325).

Almost surely, 2^51415505 is an apocalyptic number.

It is an amenable number.

51415505 is a deficient number, since it is larger than the sum of its proper divisors (10355095).

51415505 is a wasteful number, since it uses less digits than its factorization.

51415505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12003.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 51415505 is about 7170.4605849276. The cubic root of 51415505 is about 371.8473595255.

The spelling of 51415505 in words is "fifty-one million, four hundred fifteen thousand, five hundred five".