51005145 has 32 divisors (see below), whose sum is σ = 85773312. Its totient is φ = 25831872.

The previous prime is 51005057. The next prime is 51005167. The reversal of 51005145 is 54150015.

It is not a de Polignac number, because 51005145 - 2⁹ = 51004633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55782 + ... + 56688.

It is an arithmetic number, because the mean of its divisors is an integer number (2680416).

Almost surely, 2^51005145 is an apocalyptic number.

It is an amenable number.

51005145 is a deficient number, since it is larger than the sum of its proper divisors (34768167).

51005145 is a wasteful number, since it uses less digits than its factorization.

51005145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 51005145 is about 7141.7886415099. The cubic root of 51005145 is about 370.8554470113.

The spelling of 51005145 in words is "fifty-one million, five thousand, one hundred forty-five".