431400234133221 has 32 divisors (see below), whose sum is σ = 579826148290560. Its totient is φ = 285297900888000.

The previous prime is 431400234133181. The next prime is 431400234133327. The reversal of 431400234133221 is 122331432004134.

It is not a de Polignac number, because 431400234133221 - 2¹⁷ = 431400234002149 is a prime.

It is a super-2 number, since 2×431400234133221² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431400230133221) 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, 289507771 + ... + 290994071.

It is an arithmetic number, because the mean of its divisors is an integer number (18119567134080).

Almost surely, 2^{431400234133221} is an apocalyptic number.

It is an amenable number.

431400234133221 is a deficient number, since it is larger than the sum of its proper divisors (148425914157339).

431400234133221 is a wasteful number, since it uses less digits than its factorization.

431400234133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488097.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 431400234133221 its reverse (122331432004134), we get a palindrome (553731666137355).

The spelling of 431400234133221 in words is "four hundred thirty-one trillion, four hundred billion, two hundred thirty-four million, one hundred thirty-three thousand, two hundred twenty-one".