31542143377 has 2 divisors, whose sum is σ = 31542143378. Its totient is φ = 31542143376.

The previous prime is 31542143299. The next prime is 31542143401. The reversal of 31542143377 is 77334124513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31405510656 + 136632721 = 177216^2 + 11689^2 .

It is a cyclic number.

It is not a de Polignac number, because 31542143377 - 2³¹ = 29394659729 is a prime.

It is not a weakly prime, because it can be changed into another prime (31542143177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771071688 + 15771071689.

It is an arithmetic number, because the mean of its divisors is an integer number (15771071689).

Almost surely, 2^31542143377 is an apocalyptic number.

It is an amenable number.

31542143377 is a deficient number, since it is larger than the sum of its proper divisors (1).

31542143377 is an equidigital number, since it uses as much as digits as its factorization.

31542143377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 40.

The spelling of 31542143377 in words is "thirty-one billion, five hundred forty-two million, one hundred forty-three thousand, three hundred seventy-seven".