51019042 has 4 divisors (see below), whose sum is σ = 76528566. Its totient is φ = 25509520.

The previous prime is 51018953. The next prime is 51019061. The reversal of 51019042 is 24091015.

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

It can be written as a sum of positive squares in only one way, i.e., 29387241 + 21631801 = 5421^2 + 4651^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12754759 + ... + 12754762.

Almost surely, 2^51019042 is an apocalyptic number.

51019042 is a deficient number, since it is larger than the sum of its proper divisors (25509524).

51019042 is a wasteful number, since it uses less digits than its factorization.

51019042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25509523.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 51019042 is about 7142.7615107884. The cubic root of 51019042 is about 370.8891253794.

The spelling of 51019042 in words is "fifty-one million, nineteen thousand, forty-two".