51605045 has 16 divisors (see below), whose sum is σ = 65499840. Its totient is φ = 38922624.

The previous prime is 51605039. The next prime is 51605063. The reversal of 51605045 is 54050615.

It is a cyclic number.

It is not a de Polignac number, because 51605045 - 2¹² = 51600949 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20369 + ... + 22761.

It is an arithmetic number, because the mean of its divisors is an integer number (4093740).

Almost surely, 2^51605045 is an apocalyptic number.

It is an amenable number.

51605045 is a deficient number, since it is larger than the sum of its proper divisors (13894795).

51605045 is a wasteful number, since it uses less digits than its factorization.

51605045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 51605045 is about 7183.6651508822. The cubic root of 51605045 is about 372.3037297641.

The spelling of 51605045 in words is "fifty-one million, six hundred five thousand, forty-five".