1331225685 has 48 divisors (see below), whose sum is σ = 2406680640. Its totient is φ = 705905280.

The previous prime is 1331225683. The next prime is 1331225689. The reversal of 1331225685 is 5865221331.

1331225685 is a `hidden beast` number, since 13 + 312 + 256 + 85 = 666.

It is not a de Polignac number, because 1331225685 - 2¹ = 1331225683 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331225683) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 214425 + ... + 220545.

It is an arithmetic number, because the mean of its divisors is an integer number (50139180).

Almost surely, 2^1331225685 is an apocalyptic number.

1331225685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1331225685 is a deficient number, since it is larger than the sum of its proper divisors (1075454955).

1331225685 is an equidigital number, since it uses as much as digits as its factorization.

1331225685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6320 (or 6308 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 1331225685 is about 36485.9655895250. The cubic root of 1331225685 is about 1100.0621686627.

The spelling of 1331225685 in words is "one billion, three hundred thirty-one million, two hundred twenty-five thousand, six hundred eighty-five".