1331225651 has 8 divisors (see below), whose sum is σ = 1521848160. Its totient is φ = 1140715008.

The previous prime is 1331225617. The next prime is 1331225659. The reversal of 1331225651 is 1565221331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1331225651 - 2⁶ = 1331225587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331225659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686 + ... + 51603.

It is an arithmetic number, because the mean of its divisors is an integer number (190231020).

Almost surely, 2^1331225651 is an apocalyptic number.

1331225651 is a deficient number, since it is larger than the sum of its proper divisors (190622509).

1331225651 is an equidigital number, since it uses as much as digits as its factorization.

1331225651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55933.

The product of its digits is 5400, while the sum is 29.

The square root of 1331225651 is about 36485.9651235924. The cubic root of 1331225651 is about 1100.0621592973.

Adding to 1331225651 its reverse (1565221331), we get a palindrome (2896446982).

The spelling of 1331225651 in words is "one billion, three hundred thirty-one million, two hundred twenty-five thousand, six hundred fifty-one".