84256631 has 4 divisors (see below), whose sum is σ = 84335232. Its totient is φ = 84178032.

The previous prime is 84256619. The next prime is 84256637. The reversal of 84256631 is 13665248.

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 84256631 - 2²² = 80062327 is a prime.

It is a super-2 number, since 2×84256631² = 14198359734940322, 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 = 84256591 and 84256600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84256637) 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, 37670 + ... + 39843.

It is an arithmetic number, because the mean of its divisors is an integer number (21083808).

Almost surely, 2^84256631 is an apocalyptic number.

84256631 is a deficient number, since it is larger than the sum of its proper divisors (78601).

84256631 is a wasteful number, since it uses less digits than its factorization.

84256631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78600.

The product of its digits is 34560, while the sum is 35.

The square root of 84256631 is about 9179.1410818224. The cubic root of 84256631 is about 438.3974607112.

The spelling of 84256631 in words is "eighty-four million, two hundred fifty-six thousand, six hundred thirty-one".