42551889 has 4 divisors (see below), whose sum is σ = 56735856. Its totient is φ = 28367924.

The previous prime is 42551881. The next prime is 42551893. The reversal of 42551889 is 98815524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42551889 - 2³ = 42551881 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42551889.

It is not an unprimeable number, because it can be changed into a prime (42551881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7091979 + ... + 7091984.

It is an arithmetic number, because the mean of its divisors is an integer number (14183964).

Almost surely, 2^42551889 is an apocalyptic number.

It is an amenable number.

42551889 is a deficient number, since it is larger than the sum of its proper divisors (14183967).

42551889 is a wasteful number, since it uses less digits than its factorization.

42551889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14183966.

The product of its digits is 115200, while the sum is 42.

The square root of 42551889 is about 6523.1808958513. The cubic root of 42551889 is about 349.1185684822.

The spelling of 42551889 in words is "forty-two million, five hundred fifty-one thousand, eight hundred eighty-nine".