31400420371 has 2 divisors, whose sum is σ = 31400420372. Its totient is φ = 31400420370.

The previous prime is 31400420353. The next prime is 31400420377. The reversal of 31400420371 is 17302400413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31400420371 - 2⁵ = 31400420339 is a prime.

It is not a weakly prime, because it can be changed into another prime (31400420377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700210185 + 15700210186.

It is an arithmetic number, because the mean of its divisors is an integer number (15700210186).

Almost surely, 2^31400420371 is an apocalyptic number.

31400420371 is a deficient number, since it is larger than the sum of its proper divisors (1).

31400420371 is an equidigital number, since it uses as much as digits as its factorization.

31400420371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 31400420371 its reverse (17302400413), we get a palindrome (48702820784).

The spelling of 31400420371 in words is "thirty-one billion, four hundred million, four hundred twenty thousand, three hundred seventy-one".