31542143279 has 2 divisors, whose sum is σ = 31542143280. Its totient is φ = 31542143278.

The previous prime is 31542143261. The next prime is 31542143299. The reversal of 31542143279 is 97234124513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31542143279 - 2³² = 27247175983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31542143299) 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, 15771071639 + 15771071640.

It is an arithmetic number, because the mean of its divisors is an integer number (15771071640).

Almost surely, 2^31542143279 is an apocalyptic number.

31542143279 is a deficient number, since it is larger than the sum of its proper divisors (1).

31542143279 is an equidigital number, since it uses as much as digits as its factorization.

31542143279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 41.

The spelling of 31542143279 in words is "thirty-one billion, five hundred forty-two million, one hundred forty-three thousand, two hundred seventy-nine".