51870158 has 4 divisors (see below), whose sum is σ = 77805240. Its totient is φ = 25935078.

The previous prime is 51870151. The next prime is 51870163. The reversal of 51870158 is 85107815.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51870151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12967538 + ... + 12967541.

It is an arithmetic number, because the mean of its divisors is an integer number (19451310).

Almost surely, 2^51870158 is an apocalyptic number.

51870158 is a deficient number, since it is larger than the sum of its proper divisors (25935082).

51870158 is a wasteful number, since it uses less digits than its factorization.

51870158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25935081.

The product of its (nonzero) digits is 11200, while the sum is 35.

The square root of 51870158 is about 7202.0940010527. The cubic root of 51870158 is about 372.9401921899.

The spelling of 51870158 in words is "fifty-one million, eight hundred seventy thousand, one hundred fifty-eight".