431220020 has 48 divisors (see below), whose sum is σ = 1129016448. Its totient is φ = 134405760.

The previous prime is 431220019. The next prime is 431220059. The reversal of 431220020 is 20022134.

431220020 = 2170² + 2171² + ... + 2257².

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 431219977 and 431220004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138467 + ... + 141546.

It is an arithmetic number, because the mean of its divisors is an integer number (23521176).

Almost surely, 2^431220020 is an apocalyptic number.

It is an amenable number.

431220020 is an abundant number, since it is smaller than the sum of its proper divisors (697796428).

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

431220020 is a wasteful number, since it uses less digits than its factorization.

431220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280040 (or 280038 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 431220020 is about 20765.8378111744. The cubic root of 431220020 is about 755.4973960262.

Adding to 431220020 its reverse (20022134), we get a palindrome (451242154).

The spelling of 431220020 in words is "four hundred thirty-one million, two hundred twenty thousand, twenty".