450145431 has 20 divisors (see below), whose sum is σ = 711996912. Its totient is φ = 282443328.

The previous prime is 450145429. The next prime is 450145439. The reversal of 450145431 is 134541054.

It is a happy number.

It is not a de Polignac number, because 450145431 - 2¹ = 450145429 is a prime.

It is a super-2 number, since 2×450145431² = 405261818100351522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 450145395 and 450145404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450145439) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 162075 + ... + 164828.

Almost surely, 2^450145431 is an apocalyptic number.

450145431 is a deficient number, since it is larger than the sum of its proper divisors (261851481).

450145431 is a wasteful number, since it uses less digits than its factorization.

450145431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326932 (or 326923 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 450145431 is about 21216.6310002319. The cubic root of 450145431 is about 766.3919754629.

Adding to 450145431 its reverse (134541054), we get a palindrome (584686485).

The spelling of 450145431 in words is "four hundred fifty million, one hundred forty-five thousand, four hundred thirty-one".