31424419991 has 2 divisors, whose sum is σ = 31424419992. Its totient is φ = 31424419990.

The previous prime is 31424419973. The next prime is 31424420003. The reversal of 31424419991 is 19991442413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31424419991 - 2³⁰ = 30350678167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31424469991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15712209995 + 15712209996.

It is an arithmetic number, because the mean of its divisors is an integer number (15712209996).

Almost surely, 2^31424419991 is an apocalyptic number.

31424419991 is a deficient number, since it is larger than the sum of its proper divisors (1).

31424419991 is an equidigital number, since it uses as much as digits as its factorization.

31424419991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The spelling of 31424419991 in words is "thirty-one billion, four hundred twenty-four million, four hundred nineteen thousand, nine hundred ninety-one".