31348157 has 6 divisors (see below), whose sum is σ = 33085278. Its totient is φ = 29697912.

The previous prime is 31348151. The next prime is 31348181. The reversal of 31348157 is 75184313.

It can be written as a sum of positive squares in only one way, i.e., 29528356 + 1819801 = 5434^2 + 1349^2 .

It is not a de Polignac number, because 31348157 - 2¹⁶ = 31282621 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 (31348151) 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 5 ways as a sum of consecutive naturals, for example, 43058 + ... + 43779.

It is an arithmetic number, because the mean of its divisors is an integer number (5514213).

Almost surely, 2^31348157 is an apocalyptic number.

It is an amenable number.

31348157 is a deficient number, since it is larger than the sum of its proper divisors (1737121).

31348157 is an equidigital number, since it uses as much as digits as its factorization.

31348157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86875 (or 86856 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 31348157 is about 5598.9424894349. The cubic root of 31348157 is about 315.3097046402.

The spelling of 31348157 in words is "thirty-one million, three hundred forty-eight thousand, one hundred fifty-seven".