31551143147 has 2 divisors, whose sum is σ = 31551143148. Its totient is φ = 31551143146.

The previous prime is 31551143123. The next prime is 31551143153. The reversal of 31551143147 is 74134115513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31551143147 - 2⁸ = 31551142891 is a prime.

It is not a weakly prime, because it can be changed into another prime (31551143447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15775571573 + 15775571574.

It is an arithmetic number, because the mean of its divisors is an integer number (15775571574).

Almost surely, 2^31551143147 is an apocalyptic number.

31551143147 is a deficient number, since it is larger than the sum of its proper divisors (1).

31551143147 is an equidigital number, since it uses as much as digits as its factorization.

31551143147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 35.

The spelling of 31551143147 in words is "thirty-one billion, five hundred fifty-one million, one hundred forty-three thousand, one hundred forty-seven".