31362145 has 4 divisors (see below), whose sum is σ = 37634580. Its totient is φ = 25089712.

The previous prime is 31362143. The next prime is 31362169. The reversal of 31362145 is 54126313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54126313 = 701 ⋅77213.

It can be written as a sum of positive squares in 2 ways, for example, as 21013056 + 10349089 = 4584^2 + 3217^2 .

It is a cyclic number.

It is not a de Polignac number, because 31362145 - 2¹ = 31362143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31362143) 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, 3136210 + ... + 3136219.

It is an arithmetic number, because the mean of its divisors is an integer number (9408645).

Almost surely, 2^31362145 is an apocalyptic number.

It is an amenable number.

31362145 is a deficient number, since it is larger than the sum of its proper divisors (6272435).

31362145 is an equidigital number, since it uses as much as digits as its factorization.

31362145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6272434.

The product of its digits is 2160, while the sum is 25.

The square root of 31362145 is about 5600.1915145823. The cubic root of 31362145 is about 315.3565962463.

Adding to 31362145 its reverse (54126313), we get a palindrome (85488458).

The spelling of 31362145 in words is "thirty-one million, three hundred sixty-two thousand, one hundred forty-five".