31421238047 has 2 divisors, whose sum is σ = 31421238048. Its totient is φ = 31421238046.

The previous prime is 31421238029. The next prime is 31421238061. The reversal of 31421238047 is 74083212413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31421238047 - 2⁶ = 31421237983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31421237998 and 31421238016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31421838047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710619023 + 15710619024.

It is an arithmetic number, because the mean of its divisors is an integer number (15710619024).

Almost surely, 2^31421238047 is an apocalyptic number.

31421238047 is a deficient number, since it is larger than the sum of its proper divisors (1).

31421238047 is an equidigital number, since it uses as much as digits as its factorization.

31421238047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 31421238047 in words is "thirty-one billion, four hundred twenty-one million, two hundred thirty-eight thousand, forty-seven".