42544631 has 4 divisors (see below), whose sum is σ = 42567000. Its totient is φ = 42522264.

The previous prime is 42544627. The next prime is 42544643. The reversal of 42544631 is 13644524.

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

It is a cyclic number.

It is not a de Polignac number, because 42544631 - 2² = 42544627 is a prime.

It is a super-2 number, since 2×42544631² = 3620091253852322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42544594 and 42544603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42544651) 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, 8036 + ... + 12233.

It is an arithmetic number, because the mean of its divisors is an integer number (10641750).

Almost surely, 2^42544631 is an apocalyptic number.

42544631 is a deficient number, since it is larger than the sum of its proper divisors (22369).

42544631 is a wasteful number, since it uses less digits than its factorization.

42544631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22368.

The product of its digits is 11520, while the sum is 29.

The square root of 42544631 is about 6522.6245484467. The cubic root of 42544631 is about 349.0987178425.

The spelling of 42544631 in words is "forty-two million, five hundred forty-four thousand, six hundred thirty-one".