31424140157 has 2 divisors, whose sum is σ = 31424140158. Its totient is φ = 31424140156.

The previous prime is 31424140141. The next prime is 31424140159. The reversal of 31424140157 is 75104142413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20555243641 + 10868896516 = 143371^2 + 104254^2 .

It is a cyclic number.

It is not a de Polignac number, because 31424140157 - 2⁴ = 31424140141 is a prime.

Together with 31424140159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31424140159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15712070078 + 15712070079.

It is an arithmetic number, because the mean of its divisors is an integer number (15712070079).

Almost surely, 2^31424140157 is an apocalyptic number.

It is an amenable number.

31424140157 is a deficient number, since it is larger than the sum of its proper divisors (1).

31424140157 is an equidigital number, since it uses as much as digits as its factorization.

31424140157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 31424140157 in words is "thirty-one billion, four hundred twenty-four million, one hundred forty thousand, one hundred fifty-seven".