42251918 has 16 divisors (see below), whose sum is σ = 64851840. Its totient is φ = 20638176.

The previous prime is 42251917. The next prime is 42251933. The reversal of 42251918 is 81915224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28643 + ... + 30081.

It is an arithmetic number, because the mean of its divisors is an integer number (4053240).

Almost surely, 2^42251918 is an apocalyptic number.

42251918 is a deficient number, since it is larger than the sum of its proper divisors (22599922).

42251918 is a wasteful number, since it uses less digits than its factorization.

42251918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771.

The product of its digits is 5760, while the sum is 32.

The square root of 42251918 is about 6500.1475367871. The cubic root of 42251918 is about 348.2962587058.

The spelling of 42251918 in words is "forty-two million, two hundred fifty-one thousand, nine hundred eighteen".