31322030431 has 4 divisors (see below), whose sum is σ = 32168571832. Its totient is φ = 30475489032.

The previous prime is 31322030353. The next prime is 31322030473. The reversal of 31322030431 is 13403022313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13403022313 = 19 ⋅705422227.

It is a cyclic number.

It is not a de Polignac number, because 31322030431 - 2⁷ = 31322030303 is a prime.

It is a super-2 number, since 2×31322030431² (a number of 22 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 (31322031431) 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, 423270645 + ... + 423270718.

It is an arithmetic number, because the mean of its divisors is an integer number (8042142958).

Almost surely, 2^31322030431 is an apocalyptic number.

31322030431 is a deficient number, since it is larger than the sum of its proper divisors (846541401).

31322030431 is an equidigital number, since it uses as much as digits as its factorization.

31322030431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846541400.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31322030431 its reverse (13403022313), we get a palindrome (44725052744).

The spelling of 31322030431 in words is "thirty-one billion, three hundred twenty-two million, thirty thousand, four hundred thirty-one".