31406361 has 16 divisors (see below), whose sum is σ = 50673024. Its totient is φ = 16890624.

The previous prime is 31406359. The next prime is 31406363. The reversal of 31406361 is 16360413.

It is an interprime number because it is at equal distance from previous prime (31406359) and next prime (31406363).

It is not a de Polignac number, because 31406361 - 2¹ = 31406359 is a prime.

It is a super-2 number, since 2×31406361² = 1972719022524642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31406363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43630 + ... + 44343.

It is an arithmetic number, because the mean of its divisors is an integer number (3167064).

Almost surely, 2^31406361 is an apocalyptic number.

It is an amenable number.

31406361 is a deficient number, since it is larger than the sum of its proper divisors (19266663).

31406361 is a wasteful number, since it uses less digits than its factorization.

31406361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88000.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31406361 is about 5604.1378462704. The cubic root of 31406361 is about 315.5047287532.

Adding to 31406361 its reverse (16360413), we get a palindrome (47766774).

The spelling of 31406361 in words is "thirty-one million, four hundred six thousand, three hundred sixty-one".