42251388 has 48 divisors (see below), whose sum is σ = 103735296. Its totient is φ = 13366080.

The previous prime is 42251387. The next prime is 42251401. The reversal of 42251388 is 88315224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42251381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18645 + ... + 20787.

It is an arithmetic number, because the mean of its divisors is an integer number (2161152).

Almost surely, 2^42251388 is an apocalyptic number.

It is an amenable number.

42251388 is an abundant number, since it is smaller than the sum of its proper divisors (61483908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42251388 is a wasteful number, since it uses less digits than its factorization.

42251388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234 (or 2232 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 42251388 is about 6500.1067683539. The cubic root of 42251388 is about 348.2948023791.

The spelling of 42251388 in words is "forty-two million, two hundred fifty-one thousand, three hundred eighty-eight".