31425215013 has 24 divisors (see below), whose sum is σ = 45585178496. Its totient is φ = 20861064000.

The previous prime is 31425215011. The next prime is 31425215051. The reversal of 31425215013 is 31051252413.

It is not a de Polignac number, because 31425215013 - 2¹ = 31425215011 is a prime.

It is a super-2 number, since 2×31425215013² (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 (31425215011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7478313 + ... + 7482513.

Almost surely, 2^31425215013 is an apocalyptic number.

It is an amenable number.

31425215013 is a deficient number, since it is larger than the sum of its proper divisors (14159963483).

31425215013 is a wasteful number, since it uses less digits than its factorization.

31425215013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7545 (or 7542 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 31425215013 its reverse (31051252413), we get a palindrome (62476467426).

The spelling of 31425215013 in words is "thirty-one billion, four hundred twenty-five million, two hundred fifteen thousand, thirteen".