31427491559 has 4 divisors (see below), whose sum is σ = 31858005216. Its totient is φ = 30996977904.

The previous prime is 31427491517. The next prime is 31427491561. The reversal of 31427491559 is 95519472413.

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-31427491559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31427491159) 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, 215256719 + ... + 215256864.

It is an arithmetic number, because the mean of its divisors is an integer number (7964501304).

Almost surely, 2^31427491559 is an apocalyptic number.

31427491559 is a deficient number, since it is larger than the sum of its proper divisors (430513657).

31427491559 is an equidigital number, since it uses as much as digits as its factorization.

31427491559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430513656.

The product of its digits is 1360800, while the sum is 50.

The spelling of 31427491559 in words is "thirty-one billion, four hundred twenty-seven million, four hundred ninety-one thousand, five hundred fifty-nine".