1331245550 has 24 divisors (see below), whose sum is σ = 2481798000. Its totient is φ = 531276480.

The previous prime is 1331245499. The next prime is 1331245637. The reversal of 1331245550 is 555421331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8375 + ... + 52274.

It is an arithmetic number, because the mean of its divisors is an integer number (103408250).

Almost surely, 2^1331245550 is an apocalyptic number.

1331245550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331245550 is a deficient number, since it is larger than the sum of its proper divisors (1150552450).

1331245550 is a wasteful number, since it uses less digits than its factorization.

1331245550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61100 (or 61095 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 1331245550 is about 36486.2378164699. The cubic root of 1331245550 is about 1100.0676404687.

Adding to 1331245550 its reverse (555421331), we get a palindrome (1886666881).

The spelling of 1331245550 in words is "one billion, three hundred thirty-one million, two hundred forty-five thousand, five hundred fifty".