31040154 has 12 divisors (see below), whose sum is σ = 67253706. Its totient is φ = 10346712.

The previous prime is 31040153. The next prime is 31040161. The reversal of 31040154 is 45104013.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16040025 + 15000129 = 4005^2 + 3873^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1724453 = 31040154 / (3 + 1 + 0 + 4 + 0 + 1 + 5 + 4).

It is not an unprimeable number, because it can be changed into a prime (31040153) 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 5 ways as a sum of consecutive naturals, for example, 862209 + ... + 862244.

Almost surely, 2^31040154 is an apocalyptic number.

31040154 is an abundant number, since it is smaller than the sum of its proper divisors (36213552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31040154 is a wasteful number, since it uses less digits than its factorization.

31040154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724461 (or 1724458 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31040154 is about 5571.3691315511. The cubic root of 31040154 is about 314.2736400517.

Adding to 31040154 its reverse (45104013), we get a palindrome (76144167).

The spelling of 31040154 in words is "thirty-one million, forty thousand, one hundred fifty-four".