31090241 has 32 divisors (see below), whose sum is σ = 40255488. Its totient is φ = 23353920.

The previous prime is 31090231. The next prime is 31090243. The reversal of 31090241 is 14209013.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31090241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31090243) 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, 290510 + ... + 290616.

It is an arithmetic number, because the mean of its divisors is an integer number (1257984).

Almost surely, 2^31090241 is an apocalyptic number.

31090241 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31090241 is a deficient number, since it is larger than the sum of its proper divisors (9165247).

31090241 is a wasteful number, since it uses less digits than its factorization.

31090241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 31090241 is about 5575.8623548291. The cubic root of 31090241 is about 314.4425885768.

Adding to 31090241 its reverse (14209013), we get a palindrome (45299254).

It can be divided in two parts, 3 and 1090241, that multiplied together give a palindrome (3270723).

The spelling of 31090241 in words is "thirty-one million, ninety thousand, two hundred forty-one".