31401223001431 has 4 divisors (see below), whose sum is σ = 31414214821392. Its totient is φ = 31388231181472.

The previous prime is 31401223001363. The next prime is 31401223001483. The reversal of 31401223001431 is 13410032210413.

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 31401223001431 - 2¹⁵ = 31401222968663 is a prime.

It is a super-2 number, since 2×31401223001431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31401223001396 and 31401223001405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401223002431) 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, 6495906355 + ... + 6495911188.

It is an arithmetic number, because the mean of its divisors is an integer number (7853553705348).

Almost surely, 2^{31401223001431} is an apocalyptic number.

31401223001431 is a deficient number, since it is larger than the sum of its proper divisors (12991819961).

31401223001431 is a wasteful number, since it uses less digits than its factorization.

31401223001431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12991819960.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31401223001431 its reverse (13410032210413), we get a palindrome (44811255211844).

The spelling of 31401223001431 in words is "thirty-one trillion, four hundred one billion, two hundred twenty-three million, one thousand, four hundred thirty-one".