31421045131 has 48 divisors (see below), whose sum is σ = 39456184320. Its totient is φ = 24876149760.

The previous prime is 31421045129. The next prime is 31421045137. The reversal of 31421045131 is 13154012413.

It is not a de Polignac number, because 31421045131 - 2¹ = 31421045129 is a prime.

It is a super-2 number, since 2×31421045131² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31421045096 and 31421045105.

It is not an unprimeable number, because it can be changed into a prime (31421045137) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25817835 + ... + 25819051.

It is an arithmetic number, because the mean of its divisors is an integer number (822003840).

Almost surely, 2^31421045131 is an apocalyptic number.

31421045131 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

31421045131 is a deficient number, since it is larger than the sum of its proper divisors (8035139189).

31421045131 is a wasteful number, since it uses less digits than its factorization.

31421045131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024 (or 2017 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 31421045131 its reverse (13154012413), we get a palindrome (44575057544).

The spelling of 31421045131 in words is "thirty-one billion, four hundred twenty-one million, forty-five thousand, one hundred thirty-one".