51515495 has 4 divisors (see below), whose sum is σ = 61818600. Its totient is φ = 41212392.

The previous prime is 51515489. The next prime is 51515501. The reversal of 51515495 is 59451515.

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

It is an interprime number because it is at equal distance from previous prime (51515489) and next prime (51515501).

It is a cyclic number.

It is not a de Polignac number, because 51515495 - 2¹⁴ = 51499111 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5151545 + ... + 5151554.

It is an arithmetic number, because the mean of its divisors is an integer number (15454650).

Almost surely, 2^51515495 is an apocalyptic number.

51515495 is a deficient number, since it is larger than the sum of its proper divisors (10303105).

51515495 is a wasteful number, since it uses less digits than its factorization.

51515495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10303104.

The product of its digits is 22500, while the sum is 35.

The square root of 51515495 is about 7177.4295538166. The cubic root of 51515495 is about 372.0882527539.

The spelling of 51515495 in words is "fifty-one million, five hundred fifteen thousand, four hundred ninety-five".