1431252220 has 24 divisors (see below), whose sum is σ = 3006383184. Its totient is φ = 572357376.

The previous prime is 1431252209. The next prime is 1431252239. The reversal of 1431252220 is 222521341.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1431252191 and 1431252200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113764 + ... + 125716.

It is an arithmetic number, because the mean of its divisors is an integer number (125265966).

Almost surely, 2^1431252220 is an apocalyptic number.

1431252220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1431252220 is an abundant number, since it is smaller than the sum of its proper divisors (1575130964).

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

1431252220 is a wasteful number, since it uses less digits than its factorization.

1431252220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17949 (or 17947 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1431252220 is about 37831.8942163884. The cubic root of 1431252220 is about 1126.9519285540.

Adding to 1431252220 its reverse (222521341), we get a palindrome (1653773561).

The spelling of 1431252220 in words is "one billion, four hundred thirty-one million, two hundred fifty-two thousand, two hundred twenty".