31450147 has 4 divisors (see below), whose sum is σ = 32043600. Its totient is φ = 30856696.

The previous prime is 31450141. The next prime is 31450163. The reversal of 31450147 is 74105413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31450147 is a prime.

It is a super-2 number, since 2×31450147² = 1978223492643218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31450141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296647 + ... + 296752.

It is an arithmetic number, because the mean of its divisors is an integer number (8010900).

Almost surely, 2^31450147 is an apocalyptic number.

31450147 is a deficient number, since it is larger than the sum of its proper divisors (593453).

31450147 is an equidigital number, since it uses as much as digits as its factorization.

31450147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593452.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 31450147 is about 5608.0430633154. The cubic root of 31450147 is about 315.6512837243.

The spelling of 31450147 in words is "thirty-one million, four hundred fifty thousand, one hundred forty-seven".