33401224431 has 12 divisors (see below), whose sum is σ = 48247822480. Its totient is φ = 22266740160.

The previous prime is 33401224399. The next prime is 33401224459. The reversal of 33401224431 is 13442210433.

33401224431 is a `hidden beast` number, since 3 + 3 + 4 + 0 + 1 + 224 + 431 = 666.

It is not a de Polignac number, because 33401224431 - 2⁵ = 33401224399 is a prime.

It is a super-2 number, since 2×33401224431² (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 = 33401224395 and 33401224404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33401224471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421926 + ... + 494796.

Almost surely, 2^33401224431 is an apocalyptic number.

33401224431 is a deficient number, since it is larger than the sum of its proper divisors (14846598049).

33401224431 is a wasteful number, since it uses less digits than its factorization.

33401224431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123806 (or 123803 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 33401224431 its reverse (13442210433), we get a palindrome (46843434864).

The spelling of 33401224431 in words is "thirty-three billion, four hundred one million, two hundred twenty-four thousand, four hundred thirty-one".