13212345550 has 24 divisors (see below), whose sum is σ = 25146477576. Its totient is φ = 5162031840.

The previous prime is 13212345541. The next prime is 13212345563. The reversal of 13212345550 is 5554321231.

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, 3070489 + ... + 3074788.

It is an arithmetic number, because the mean of its divisors is an integer number (1047769899).

Almost surely, 2^13212345550 is an apocalyptic number.

13212345550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13212345550 is a deficient number, since it is larger than the sum of its proper divisors (11934132026).

13212345550 is a wasteful number, since it uses less digits than its factorization.

13212345550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6145332 (or 6145327 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 13212345550 its reverse (5554321231), we get a palindrome (18766666781).

The spelling of 13212345550 in words is "thirteen billion, two hundred twelve million, three hundred forty-five thousand, five hundred fifty".