31431434424015 has 16 divisors (see below), whose sum is σ = 53248547730528. Its totient is φ = 15777347475456.

The previous prime is 31431434423989. The next prime is 31431434424053. The reversal of 31431434424015 is 51042443413413.

It is a happy number.

It is not a de Polignac number, because 31431434424015 - 2⁶ = 31431434423951 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61630263322 + ... + 61630263831.

It is an arithmetic number, because the mean of its divisors is an integer number (3328034233158).

Almost surely, 2^{31431434424015} is an apocalyptic number.

31431434424015 is a deficient number, since it is larger than the sum of its proper divisors (21817113306513).

31431434424015 is a wasteful number, since it uses less digits than its factorization.

31431434424015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123260527178.

The product of its (nonzero) digits is 276480, while the sum is 39.

Adding to 31431434424015 its reverse (51042443413413), we get a palindrome (82473877837428).

The spelling of 31431434424015 in words is "thirty-one trillion, four hundred thirty-one billion, four hundred thirty-four million, four hundred twenty-four thousand, fifteen".