31557155333242 has 16 divisors (see below), whose sum is σ = 59015978805312. Its totient is φ = 12294995584320.

The previous prime is 31557155333201. The next prime is 31557155333261. The reversal of 31557155333242 is 24233355175513.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102458296383 + ... + 102458296690.

It is an arithmetic number, because the mean of its divisors is an integer number (3688498675332).

Almost surely, 2^{31557155333242} is an apocalyptic number.

31557155333242 is a deficient number, since it is larger than the sum of its proper divisors (27458823472070).

31557155333242 is a wasteful number, since it uses less digits than its factorization.

31557155333242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204916593093.

The product of its digits is 5670000, while the sum is 49.

The spelling of 31557155333242 in words is "thirty-one trillion, five hundred fifty-seven billion, one hundred fifty-five million, three hundred thirty-three thousand, two hundred forty-two".