31434030421 has 4 divisors (see below), whose sum is σ = 33283091052. Its totient is φ = 29584969792.

The previous prime is 31434030377. The next prime is 31434030427. The reversal of 31434030421 is 12403043413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12403043413 = 17 ⋅729590789.

It can be written as a sum of positive squares in 2 ways, for example, as 25885270321 + 5548760100 = 160889^2 + 74490^2 .

It is a cyclic number.

It is not a de Polignac number, because 31434030421 - 2¹⁷ = 31433899349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31434030427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924530290 + ... + 924530323.

It is an arithmetic number, because the mean of its divisors is an integer number (8320772763).

Almost surely, 2^31434030421 is an apocalyptic number.

It is an amenable number.

31434030421 is a deficient number, since it is larger than the sum of its proper divisors (1849060631).

31434030421 is a wasteful number, since it uses less digits than its factorization.

31434030421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849060630.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31434030421 its reverse (12403043413), we get a palindrome (43837073834).

The spelling of 31434030421 in words is "thirty-one billion, four hundred thirty-four million, thirty thousand, four hundred twenty-one".