31396145 has 8 divisors (see below), whose sum is σ = 41100480. Its totient is φ = 22833520.

The previous prime is 31396139. The next prime is 31396147. The reversal of 31396145 is 54169313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31396145 - 2¹⁸ = 31134001 is a prime.

It is a super-2 number, since 2×31396145² = 1971435841722050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31396147) 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 7 ways as a sum of consecutive naturals, for example, 285365 + ... + 285474.

It is an arithmetic number, because the mean of its divisors is an integer number (5137560).

Almost surely, 2^31396145 is an apocalyptic number.

It is an amenable number.

31396145 is a deficient number, since it is larger than the sum of its proper divisors (9704335).

31396145 is a wasteful number, since it uses less digits than its factorization.

31396145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570855.

The product of its digits is 9720, while the sum is 32.

The square root of 31396145 is about 5603.2263027652. The cubic root of 31396145 is about 315.4705154521.

The spelling of 31396145 in words is "thirty-one million, three hundred ninety-six thousand, one hundred forty-five".