233401531433421 has 32 divisors (see below), whose sum is σ = 336826053155200. Its totient is φ = 142911078395904.

The previous prime is 233401531433293. The next prime is 233401531433461. The reversal of 233401531433421 is 124334135104332.

It is a happy number.

It is not a de Polignac number, because 233401531433421 - 2⁷ = 233401531433293 is a prime.

It is a super-2 number, since 2×233401531433421² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 233401531433421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233401531433461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10800196 + ... + 24154653.

It is an arithmetic number, because the mean of its divisors is an integer number (10525814161100).

Almost surely, 2^{233401531433421} is an apocalyptic number.

It is an amenable number.

233401531433421 is a deficient number, since it is larger than the sum of its proper divisors (103424521721779).

233401531433421 is a wasteful number, since it uses less digits than its factorization.

233401531433421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34955725.

The product of its (nonzero) digits is 311040, while the sum is 39.

Adding to 233401531433421 its reverse (124334135104332), we get a palindrome (357735666537753).

The spelling of 233401531433421 in words is "two hundred thirty-three trillion, four hundred one billion, five hundred thirty-one million, four hundred thirty-three thousand, four hundred twenty-one".