431431552 has 32 divisors (see below), whose sum is σ = 864505080. Its totient is φ = 214457856.

The previous prime is 431431549. The next prime is 431431603. The reversal of 431431552 is 255134134.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×431431552² = 372266368122257408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 431431552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12403 + ... + 31885.

Almost surely, 2^431431552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 431431552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (432252540).

431431552 is an abundant number, since it is smaller than the sum of its proper divisors (433073528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

431431552 is a wasteful number, since it uses less digits than its factorization.

431431552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19670 (or 19658 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 431431552 is about 20770.9304558077. The cubic root of 431431552 is about 755.6209105071.

Adding to 431431552 its reverse (255134134), we get a palindrome (686565686).

The spelling of 431431552 in words is "four hundred thirty-one million, four hundred thirty-one thousand, five hundred fifty-two".