31353486947 has 4 divisors (see below), whose sum is σ = 31884902040. Its totient is φ = 30822071856.

The previous prime is 31353486919. The next prime is 31353486991. The reversal of 31353486947 is 74968435313.

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

It is a cyclic number.

It is not a de Polignac number, because 31353486947 - 2⁶ = 31353486883 is a prime.

It is a super-2 number, since 2×31353486947² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31353486907) 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, 265707458 + ... + 265707575.

It is an arithmetic number, because the mean of its divisors is an integer number (7971225510).

Almost surely, 2^31353486947 is an apocalyptic number.

31353486947 is a deficient number, since it is larger than the sum of its proper divisors (531415093).

31353486947 is an equidigital number, since it uses as much as digits as its factorization.

31353486947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531415092.

The product of its digits is 6531840, while the sum is 53.

The spelling of 31353486947 in words is "thirty-one billion, three hundred fifty-three million, four hundred eighty-six thousand, nine hundred forty-seven".