31424134221 has 32 divisors (see below), whose sum is σ = 46720726400. Its totient is φ = 20874672000.

The previous prime is 31424134207. The next prime is 31424134223. The reversal of 31424134221 is 12243142413.

31424134221 is a `hidden beast` number, since 3 + 1 + 424 + 13 + 4 + 221 = 666.

It is not a de Polignac number, because 31424134221 - 2¹³ = 31424126029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31424134223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10469721 + ... + 10472721.

It is an arithmetic number, because the mean of its divisors is an integer number (1460022700).

Almost surely, 2^31424134221 is an apocalyptic number.

It is an amenable number.

31424134221 is a deficient number, since it is larger than the sum of its proper divisors (15296592179).

31424134221 is a wasteful number, since it uses less digits than its factorization.

31424134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266 (or 4260 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 31424134221 its reverse (12243142413), we get a palindrome (43667276634).

The spelling of 31424134221 in words is "thirty-one billion, four hundred twenty-four million, one hundred thirty-four thousand, two hundred twenty-one".