31401323401 has 4 divisors (see below), whose sum is σ = 35887226752. Its totient is φ = 26915420052.

The previous prime is 31401323381. The next prime is 31401323411. The reversal of 31401323401 is 10432310413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10432310413 = 7 ⋅1490330059.

It is a cyclic number.

It is not a de Polignac number, because 31401323401 - 2²⁵ = 31367768969 is a prime.

It is a super-2 number, since 2×31401323401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31401323411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2242951665 + ... + 2242951678.

It is an arithmetic number, because the mean of its divisors is an integer number (8971806688).

Almost surely, 2^31401323401 is an apocalyptic number.

It is an amenable number.

31401323401 is a deficient number, since it is larger than the sum of its proper divisors (4485903351).

31401323401 is an equidigital number, since it uses as much as digits as its factorization.

31401323401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485903350.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31401323401 its reverse (10432310413), we get a palindrome (41833633814).

The spelling of 31401323401 in words is "thirty-one billion, four hundred one million, three hundred twenty-three thousand, four hundred one".