42847631 has 4 divisors (see below), whose sum is σ = 43025664. Its totient is φ = 42669600.

The previous prime is 42847627. The next prime is 42847657. The reversal of 42847631 is 13674824.

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 42847631 - 2² = 42847627 is a prime.

It is a super-2 number, since 2×42847631² = 3671838964624322, 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 = 42847591 and 42847600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42847601) 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, 88655 + ... + 89136.

It is an arithmetic number, because the mean of its divisors is an integer number (10756416).

Almost surely, 2^42847631 is an apocalyptic number.

42847631 is a deficient number, since it is larger than the sum of its proper divisors (178033).

42847631 is a wasteful number, since it uses less digits than its factorization.

42847631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178032.

The product of its digits is 32256, while the sum is 35.

The square root of 42847631 is about 6545.8101866767. The cubic root of 42847631 is about 349.9255106784.

The spelling of 42847631 in words is "forty-two million, eight hundred forty-seven thousand, six hundred thirty-one".