33400431331 has 8 divisors (see below), whose sum is σ = 34251991664. Its totient is φ = 32552271360.

The previous prime is 33400431307. The next prime is 33400431343. The reversal of 33400431331 is 13313400433.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33400431331 - 2²⁵ = 33366876899 is a prime.

It is a super-2 number, since 2×33400431331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33400431296 and 33400431305.

It is not an unprimeable number, because it can be changed into a prime (33400431391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830190 + ... + 869491.

It is an arithmetic number, because the mean of its divisors is an integer number (4281498958).

Almost surely, 2^33400431331 is an apocalyptic number.

33400431331 is a deficient number, since it is larger than the sum of its proper divisors (851560333).

33400431331 is a wasteful number, since it uses less digits than its factorization.

33400431331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700181.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 33400431331 its reverse (13313400433), we get a palindrome (46713831764).

The spelling of 33400431331 in words is "thirty-three billion, four hundred million, four hundred thirty-one thousand, three hundred thirty-one".