31742361 has 24 divisors (see below), whose sum is σ = 54343744. Its totient is φ = 18137520.

The previous prime is 31742353. The next prime is 31742363. The reversal of 31742361 is 16324713.

It is not a de Polignac number, because 31742361 - 2³ = 31742353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31742363) 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 23 ways as a sum of consecutive naturals, for example, 7630 + ... + 11031.

Almost surely, 2^31742361 is an apocalyptic number.

It is an amenable number.

31742361 is a deficient number, since it is larger than the sum of its proper divisors (22601383).

31742361 is an equidigital number, since it uses as much as digits as its factorization.

31742361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18683 (or 18671 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 31742361 is about 5634.0359423774. The cubic root of 31742361 is about 316.6258792650.

The spelling of 31742361 in words is "thirty-one million, seven hundred forty-two thousand, three hundred sixty-one".