42551564 has 48 divisors (see below), whose sum is σ = 89268480. Its totient is φ = 17519040.

The previous prime is 42551557. The next prime is 42551581. The reversal of 42551564 is 46515524.

It is a self number, because there is not a number n which added to its sum of digits gives 42551564.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18122 + ... + 20334.

It is an arithmetic number, because the mean of its divisors is an integer number (1859760).

Almost surely, 2^42551564 is an apocalyptic number.

42551564 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42551564 is an abundant number, since it is smaller than the sum of its proper divisors (46716916).

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

42551564 is a wasteful number, since it uses less digits than its factorization.

42551564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270 (or 2268 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The square root of 42551564 is about 6523.1559846442. The cubic root of 42551564 is about 349.1176796550.

The spelling of 42551564 in words is "forty-two million, five hundred fifty-one thousand, five hundred sixty-four".