42552511 has 4 divisors (see below), whose sum is σ = 43273800. Its totient is φ = 41831224.

The previous prime is 42552473. The next prime is 42552527. The reversal of 42552511 is 11525524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42552511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42552011) 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, 360556 + ... + 360673.

It is an arithmetic number, because the mean of its divisors is an integer number (10818450).

Almost surely, 2^42552511 is an apocalyptic number.

42552511 is a deficient number, since it is larger than the sum of its proper divisors (721289).

42552511 is an equidigital number, since it uses as much as digits as its factorization.

42552511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721288.

The product of its digits is 2000, while the sum is 25.

The square root of 42552511 is about 6523.2285718040. The cubic root of 42552511 is about 349.1202695480.

The spelling of 42552511 in words is "forty-two million, five hundred fifty-two thousand, five hundred eleven".