31409101 has 4 divisors (see below), whose sum is σ = 31702752. Its totient is φ = 31115452.

The previous prime is 31409087. The next prime is 31409167. The reversal of 31409101 is 10190413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31409101 - 2⁵ = 31409069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31409201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146665 + ... + 146878.

It is an arithmetic number, because the mean of its divisors is an integer number (7925688).

Almost surely, 2^31409101 is an apocalyptic number.

It is an amenable number.

31409101 is a deficient number, since it is larger than the sum of its proper divisors (293651).

31409101 is a wasteful number, since it uses less digits than its factorization.

31409101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293650.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 31409101 is about 5604.3823031624. The cubic root of 31409101 is about 315.5139037291.

Adding to 31409101 its reverse (10190413), we get a palindrome (41599514).

The spelling of 31409101 in words is "thirty-one million, four hundred nine thousand, one hundred one".