51508345 has 8 divisors (see below), whose sum is σ = 70640064. Its totient is φ = 35319984.

The previous prime is 51508319. The next prime is 51508349. The reversal of 51508345 is 54380515.

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

It is not a de Polignac number, because 51508345 - 2⁵ = 51508313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51508349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735799 + ... + 735868.

It is an arithmetic number, because the mean of its divisors is an integer number (8830008).

Almost surely, 2^51508345 is an apocalyptic number.

It is an amenable number.

51508345 is a deficient number, since it is larger than the sum of its proper divisors (19131719).

51508345 is a wasteful number, since it uses less digits than its factorization.

51508345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471679.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 51508345 is about 7176.9314473527. The cubic root of 51508345 is about 372.0710375186.

The spelling of 51508345 in words is "fifty-one million, five hundred eight thousand, three hundred forty-five".