31354399999987 has 2 divisors, whose sum is σ = 31354399999988. Its totient is φ = 31354399999986.

The previous prime is 31354399999981. The next prime is 31354400000017. The reversal of 31354399999987 is 78999999345313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31354399999987 - 2³¹ = 31352252516339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31354399999898 and 31354399999907.

It is not a weakly prime, because it can be changed into another prime (31354399999981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15677199999993 + 15677199999994.

It is an arithmetic number, because the mean of its divisors is an integer number (15677199999994).

Almost surely, 2^{31354399999987} is an apocalyptic number.

31354399999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

31354399999987 is an equidigital number, since it uses as much as digits as its factorization.

31354399999987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16070775840, while the sum is 88.

The spelling of 31354399999987 in words is "thirty-one trillion, three hundred fifty-four billion, three hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty-seven".