42351556 has 48 divisors (see below), whose sum is σ = 88228224. Its totient is φ = 17588736.

The previous prime is 42351553. The next prime is 42351577. The reversal of 42351556 is 65515324.

It is a super-2 number, since 2×42351556² = 3587308591242272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42351553) 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, 19291 + ... + 21373.

It is an arithmetic number, because the mean of its divisors is an integer number (1838088).

Almost surely, 2^42351556 is an apocalyptic number.

42351556 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

42351556 is an abundant number, since it is smaller than the sum of its proper divisors (45876668).

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

42351556 is a wasteful number, since it uses less digits than its factorization.

42351556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140 (or 2138 counting only the distinct ones).

The product of its digits is 18000, while the sum is 31.

The square root of 42351556 is about 6507.8073112224. The cubic root of 42351556 is about 348.5698265562.

The spelling of 42351556 in words is "forty-two million, three hundred fifty-one thousand, five hundred fifty-six".