1331424225 has 72 divisors (see below), whose sum is σ = 2455914240. Its totient is φ = 689160960.

The previous prime is 1331424197. The next prime is 1331424251. The reversal of 1331424225 is 5224241331.

1331424225 is a `hidden beast` number, since 13 + 3 + 1 + 424 + 225 = 666.

It is not a de Polignac number, because 1331424225 - 2⁷ = 1331424097 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1448316 + ... + 1449234.

It is an arithmetic number, because the mean of its divisors is an integer number (34109920).

Almost surely, 2^1331424225 is an apocalyptic number.

1331424225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1331424225 is a deficient number, since it is larger than the sum of its proper divisors (1124490015).

1331424225 is a wasteful number, since it uses less digits than its factorization.

1331424225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119 (or 1111 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 1331424225 is about 36488.6862602643. The cubic root of 1331424225 is about 1100.1168539772.

Adding to 1331424225 its reverse (5224241331), we get a palindrome (6555665556).

The spelling of 1331424225 in words is "one billion, three hundred thirty-one million, four hundred twenty-four thousand, two hundred twenty-five".