51887145 has 32 divisors (see below), whose sum is σ = 89244288. Its totient is φ = 25648128.

The previous prime is 51887123. The next prime is 51887153. The reversal of 51887145 is 54178815.

It is not a de Polignac number, because 51887145 - 2⁵ = 51887113 is a prime.

It is a Curzon number.

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, 15567 + ... + 18603.

It is an arithmetic number, because the mean of its divisors is an integer number (2788884).

Almost surely, 2^51887145 is an apocalyptic number.

It is an amenable number.

51887145 is a deficient number, since it is larger than the sum of its proper divisors (37357143).

51887145 is a wasteful number, since it uses less digits than its factorization.

51887145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129.

The product of its digits is 44800, while the sum is 39.

The square root of 51887145 is about 7203.2732143103. The cubic root of 51887145 is about 372.9808992416.

The spelling of 51887145 in words is "fifty-one million, eight hundred eighty-seven thousand, one hundred forty-five".