31240153 has 4 divisors (see below), whose sum is σ = 35703040. Its totient is φ = 26777268.

The previous prime is 31240129. The next prime is 31240159. The reversal of 31240153 is 35104213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35104213 = 109 ⋅322057.

It is not a de Polignac number, because 31240153 - 2¹³ = 31231961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31240153.

It is not an unprimeable number, because it can be changed into a prime (31240159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2231433 + ... + 2231446.

It is an arithmetic number, because the mean of its divisors is an integer number (8925760).

Almost surely, 2^31240153 is an apocalyptic number.

It is an amenable number.

31240153 is a deficient number, since it is larger than the sum of its proper divisors (4462887).

31240153 is an equidigital number, since it uses as much as digits as its factorization.

31240153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462886.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 31240153 is about 5589.2891319022. The cubic root of 31240153 is about 314.9471751513.

Adding to 31240153 its reverse (35104213), we get a palindrome (66344366).

The spelling of 31240153 in words is "thirty-one million, two hundred forty thousand, one hundred fifty-three".