85280631 has 8 divisors (see below), whose sum is σ = 113754480. Its totient is φ = 56830272.

The previous prime is 85280621. The next prime is 85280639. The reversal of 85280631 is 13608258.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85280631 - 2¹⁸ = 85018487 is a prime.

It is a super-2 number, since 2×85280631² = 14545572047516322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85280592 and 85280601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85280639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6075 + ... + 14403.

It is an arithmetic number, because the mean of its divisors is an integer number (14219310).

Almost surely, 2^85280631 is an apocalyptic number.

85280631 is a deficient number, since it is larger than the sum of its proper divisors (28473849).

85280631 is a wasteful number, since it uses less digits than its factorization.

85280631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11745.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 85280631 is about 9234.7512689839. The cubic root of 85280631 is about 440.1663128173.

Adding to 85280631 its reverse (13608258), we get a palindrome (98888889).

The spelling of 85280631 in words is "eighty-five million, two hundred eighty thousand, six hundred thirty-one".