31445654431 has 2 divisors, whose sum is σ = 31445654432. Its totient is φ = 31445654430.

The previous prime is 31445654407. The next prime is 31445654453. The reversal of 31445654431 is 13445654413.

It is a strong prime.

It is an emirp because it is prime and its reverse (13445654413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31445654431 - 2⁵ = 31445654399 is a prime.

It is a super-2 number, since 2×31445654431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31445654131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15722827215 + 15722827216.

It is an arithmetic number, because the mean of its divisors is an integer number (15722827216).

Almost surely, 2^31445654431 is an apocalyptic number.

31445654431 is a deficient number, since it is larger than the sum of its proper divisors (1).

31445654431 is an equidigital number, since it uses as much as digits as its factorization.

31445654431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 40.

The spelling of 31445654431 in words is "thirty-one billion, four hundred forty-five million, six hundred fifty-four thousand, four hundred thirty-one".