31115214 has 24 divisors (see below), whose sum is σ = 72602712. Its totient is φ = 9573840.

The previous prime is 31115209. The next prime is 31115263. The reversal of 31115214 is 41251113.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66252 + ... + 66719.

It is an arithmetic number, because the mean of its divisors is an integer number (3025113).

Almost surely, 2^31115214 is an apocalyptic number.

31115214 is an abundant number, since it is smaller than the sum of its proper divisors (41487498).

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

31115214 is a wasteful number, since it uses less digits than its factorization.

31115214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132992 (or 132989 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 31115214 is about 5578.1012898656. The cubic root of 31115214 is about 314.5267572521.

Adding to 31115214 its reverse (41251113), we get a palindrome (72366327).

It can be divided in two parts, 31115 and 214, that added together give a square (31329 = 177²).

The spelling of 31115214 in words is "thirty-one million, one hundred fifteen thousand, two hundred fourteen".