201431424520 has 16 divisors (see below), whose sum is σ = 453220705260. Its totient is φ = 80572569792.

The previous prime is 201431424517. The next prime is 201431424541. The reversal of 201431424520 is 25424134102.

It can be written as a sum of positive squares in 2 ways, for example, as 199289030724 + 2142393796 = 446418^2 + 46286^2 .

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, 2517892767 + ... + 2517892846.

Almost surely, 2^201431424520 is an apocalyptic number.

201431424520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201431424520 is an abundant number, since it is smaller than the sum of its proper divisors (251789280740).

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

201431424520 is a wasteful number, since it uses less digits than its factorization.

201431424520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5035785624 (or 5035785620 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 201431424520 its reverse (25424134102), we get a palindrome (226855558622).

The spelling of 201431424520 in words is "two hundred one billion, four hundred thirty-one million, four hundred twenty-four thousand, five hundred twenty".