31013154 has 36 divisors (see below), whose sum is σ = 70265286. Its totient is φ = 9885216.

The previous prime is 31013153. The next prime is 31013159. The reversal of 31013154 is 45131013.

It can be written as a sum of positive squares in only one way, i.e., 21372129 + 9641025 = 4623^2 + 3105^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31013153) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7894 + ... + 11150.

Almost surely, 2^31013154 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31013154, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35132643).

31013154 is an abundant number, since it is smaller than the sum of its proper divisors (39252132).

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

31013154 is a wasteful number, since it uses less digits than its factorization.

31013154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311 (or 3285 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 31013154 is about 5568.9455016188. The cubic root of 31013154 is about 314.1824909143.

Adding to 31013154 its reverse (45131013), we get a palindrome (76144167).

The spelling of 31013154 in words is "thirty-one million, thirteen thousand, one hundred fifty-four".