51609115 has 4 divisors (see below), whose sum is σ = 61930944. Its totient is φ = 41287288.

The previous prime is 51609091. The next prime is 51609137. The reversal of 51609115 is 51190615.

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 51609115 - 2¹⁵ = 51576347 is a prime.

It is a Duffinian 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, 5160907 + ... + 5160916.

It is an arithmetic number, because the mean of its divisors is an integer number (15482736).

Almost surely, 2^51609115 is an apocalyptic number.

51609115 is a deficient number, since it is larger than the sum of its proper divisors (10321829).

51609115 is a wasteful number, since it uses less digits than its factorization.

51609115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10321828.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 51609115 is about 7183.9484268750. The cubic root of 51609115 is about 372.3135171556.

The spelling of 51609115 in words is "fifty-one million, six hundred nine thousand, one hundred fifteen".