51864158 has 16 divisors (see below), whose sum is σ = 80155680. Its totient is φ = 25150176.

The previous prime is 51864143. The next prime is 51864173. The reversal of 51864158 is 85146815.

It is an interprime number because it is at equal distance from previous prime (51864143) and next prime (51864173).

It is a congruent 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, 26663 + ... + 28541.

It is an arithmetic number, because the mean of its divisors is an integer number (5009730).

Almost surely, 2^51864158 is an apocalyptic number.

51864158 is a deficient number, since it is larger than the sum of its proper divisors (28291522).

51864158 is a wasteful number, since it uses less digits than its factorization.

51864158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291.

The product of its digits is 38400, while the sum is 38.

The square root of 51864158 is about 7201.6774434850. The cubic root of 51864158 is about 372.9258118762.

The spelling of 51864158 in words is "fifty-one million, eight hundred sixty-four thousand, one hundred fifty-eight".