42551188 has 12 divisors (see below), whose sum is σ = 74534292. Its totient is φ = 21255680.

The previous prime is 42551183. The next prime is 42551191. The reversal of 42551188 is 88115524.

It can be written as a sum of positive squares in 2 ways, for example, as 10876804 + 31674384 = 3298^2 + 5628^2 .

It is a super-2 number, since 2×42551188² = 3621207200422688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42551183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498 + ... + 9238.

It is an arithmetic number, because the mean of its divisors is an integer number (6211191).

Almost surely, 2^42551188 is an apocalyptic number.

It is an amenable number.

42551188 is a deficient number, since it is larger than the sum of its proper divisors (31983104).

42551188 is a wasteful number, since it uses less digits than its factorization.

42551188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9962 (or 9960 counting only the distinct ones).

The product of its digits is 12800, while the sum is 34.

The square root of 42551188 is about 6523.1271641752. The cubic root of 42551188 is about 349.1166513447.

The spelling of 42551188 in words is "forty-two million, five hundred fifty-one thousand, one hundred eighty-eight".