31040149 has 4 divisors (see below), whose sum is σ = 35474464. Its totient is φ = 26605836.

The previous prime is 31040137. The next prime is 31040153. The reversal of 31040149 is 94104013.

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 31040149 - 2⁵ = 31040117 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 (31040749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2217147 + ... + 2217160.

It is an arithmetic number, because the mean of its divisors is an integer number (8868616).

Almost surely, 2^31040149 is an apocalyptic number.

It is an amenable number.

31040149 is a deficient number, since it is larger than the sum of its proper divisors (4434315).

31040149 is an equidigital number, since it uses as much as digits as its factorization.

31040149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434314.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 31040149 is about 5571.3686828283. The cubic root of 31040149 is about 314.2736231771.

The spelling of 31040149 in words is "thirty-one million, forty thousand, one hundred forty-nine".