31520343414431 has 8 divisors (see below), whose sum is σ = 32674788933840. Its totient is φ = 30381821281728.

The previous prime is 31520343414409. The next prime is 31520343414451. The reversal of 31520343414431 is 13441434302513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31520343414431 - 2¹⁰ = 31520343413407 is a prime.

It is a super-2 number, since 2×31520343414431² (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 (31520343414451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3980842646 + ... + 3980850563.

It is an arithmetic number, because the mean of its divisors is an integer number (4084348616730).

Almost surely, 2^{31520343414431} is an apocalyptic number.

31520343414431 is a deficient number, since it is larger than the sum of its proper divisors (1154445519409).

31520343414431 is a wasteful number, since it uses less digits than its factorization.

31520343414431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7961693353.

The product of its (nonzero) digits is 207360, while the sum is 38.

Adding to 31520343414431 its reverse (13441434302513), we get a palindrome (44961777716944).

The spelling of 31520343414431 in words is "thirty-one trillion, five hundred twenty billion, three hundred forty-three million, four hundred fourteen thousand, four hundred thirty-one".