31349145 has 32 divisors (see below), whose sum is σ = 54633600. Its totient is φ = 15289344.

The previous prime is 31349083. The next prime is 31349167. The reversal of 31349145 is 54194313.

It is not a de Polignac number, because 31349145 - 2⁹ = 31348633 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6369 + ... + 10161.

It is an arithmetic number, because the mean of its divisors is an integer number (1707300).

Almost surely, 2^31349145 is an apocalyptic number.

It is an amenable number.

31349145 is a deficient number, since it is larger than the sum of its proper divisors (23284455).

31349145 is a wasteful number, since it uses less digits than its factorization.

31349145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3849.

The product of its digits is 6480, while the sum is 30.

The square root of 31349145 is about 5599.0307196871. The cubic root of 31349145 is about 315.3130171445.

The spelling of 31349145 in words is "thirty-one million, three hundred forty-nine thousand, one hundred forty-five".