31223455332431 has 4 divisors (see below), whose sum is σ = 31223473299864. Its totient is φ = 31223437365000.

The previous prime is 31223455332413. The next prime is 31223455332469. The reversal of 31223455332431 is 13423355432213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31223455332431 - 2²² = 31223451138127 is a prime.

It is a super-2 number, since 2×31223455332431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31223455332481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6059840 + ... + 9958341.

It is an arithmetic number, because the mean of its divisors is an integer number (7805868324966).

Almost surely, 2^{31223455332431} is an apocalyptic number.

31223455332431 is a deficient number, since it is larger than the sum of its proper divisors (17967433).

31223455332431 is a wasteful number, since it uses less digits than its factorization.

31223455332431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17967432.

The product of its digits is 777600, while the sum is 41.

The spelling of 31223455332431 in words is "thirty-one trillion, two hundred twenty-three billion, four hundred fifty-five million, three hundred thirty-two thousand, four hundred thirty-one".