31316230 has 32 divisors (see below), whose sum is σ = 63620640. Its totient is φ = 10993920.

The previous prime is 31316213. The next prime is 31316249. The reversal of 31316230 is 3261313.

It is a super-2 number, since 2×31316230² = 1961412522825800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31316198 and 31316207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1719 + ... + 8098.

It is an arithmetic number, because the mean of its divisors is an integer number (1988145).

Almost surely, 2^31316230 is an apocalyptic number.

31316230 is an abundant number, since it is smaller than the sum of its proper divisors (32304410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31316230 is a wasteful number, since it uses less digits than its factorization.

31316230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9864.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 31316230 is about 5596.0905996955. The cubic root of 31316230 is about 315.2026243157.

Adding to 31316230 its reverse (3261313), we get a palindrome (34577543).

The spelling of 31316230 in words is "thirty-one million, three hundred sixteen thousand, two hundred thirty".