1331532225 has 72 divisors (see below), whose sum is σ = 2561300352. Its totient is φ = 658828800.

The previous prime is 1331532221. The next prime is 1331532227. The reversal of 1331532225 is 5222351331.

It is a happy number.

1331532225 is a `hidden beast` number, since 1 + 3 + 315 + 322 + 25 = 666.

It is not a de Polignac number, because 1331532225 - 2² = 1331532221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331532221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 269124 + ... + 274026.

It is an arithmetic number, because the mean of its divisors is an integer number (35573616).

Almost surely, 2^1331532225 is an apocalyptic number.

1331532225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1331532225 is a deficient number, since it is larger than the sum of its proper divisors (1229768127).

1331532225 is a wasteful number, since it uses less digits than its factorization.

1331532225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5007 (or 4999 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 1331532225 is about 36490.1661410304. The cubic root of 1331532225 is about 1100.1465989189.

Adding to 1331532225 its reverse (5222351331), we get a palindrome (6553883556).

The spelling of 1331532225 in words is "one billion, three hundred thirty-one million, five hundred thirty-two thousand, two hundred twenty-five".