51607145 has 8 divisors (see below), whose sum is σ = 62712960. Its totient is φ = 40762800.

The previous prime is 51607139. The next prime is 51607163. The reversal of 51607145 is 54170615.

51607145 = 146² + 147² + ... + 540².

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

It is not a de Polignac number, because 51607145 - 2⁸ = 51606889 is a prime.

It is a Curzon number.

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, 64931 + ... + 65720.

It is an arithmetic number, because the mean of its divisors is an integer number (7839120).

Almost surely, 2^51607145 is an apocalyptic number.

It is an amenable number.

51607145 is a deficient number, since it is larger than the sum of its proper divisors (11105815).

51607145 is a wasteful number, since it uses less digits than its factorization.

51607145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130735.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 51607145 is about 7183.8113143373. The cubic root of 51607145 is about 372.3087798338.

The spelling of 51607145 in words is "fifty-one million, six hundred seven thousand, one hundred forty-five".