1331422500 has 120 divisors (see below), whose sum is σ = 3918920544. Its totient is φ = 351680000.

The previous prime is 1331422493. The next prime is 1331422529. The reversal of 1331422500 is 52241331.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 846715 + ... + 848285.

Almost surely, 2^1331422500 is an apocalyptic number.

1331422500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331422500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1959460272).

1331422500 is an abundant number, since it is smaller than the sum of its proper divisors (2587498044).

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

1331422500 is a wasteful number, since it uses less digits than its factorization.

1331422500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711 (or 1694 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1331422500 is about 36488.6626227929. The cubic root of 1331422500 is about 1100.1163788714.

Adding to 1331422500 its reverse (52241331), we get a palindrome (1383663831).

The spelling of 1331422500 in words is "one billion, three hundred thirty-one million, four hundred twenty-two thousand, five hundred".