31106361 has 32 divisors (see below), whose sum is σ = 50319360. Its totient is φ = 16833600.

The previous prime is 31106347. The next prime is 31106371. The reversal of 31106361 is 16360113.

It is not a de Polignac number, because 31106361 - 2⁶ = 31106297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31106371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12130 + ... + 14468.

It is an arithmetic number, because the mean of its divisors is an integer number (1572480).

Almost surely, 2^31106361 is an apocalyptic number.

31106361 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31106361 is a deficient number, since it is larger than the sum of its proper divisors (19212999).

31106361 is a wasteful number, since it uses less digits than its factorization.

31106361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 31106361 is about 5577.3076838202. The cubic root of 31106361 is about 314.4969243702.

Adding to 31106361 its reverse (16360113), we get a palindrome (47466474).

The spelling of 31106361 in words is "thirty-one million, one hundred six thousand, three hundred sixty-one".