13212042550 has 24 divisors (see below), whose sum is σ = 28085028336. Its totient is φ = 4529843040.

The previous prime is 13212042539. The next prime is 13212042587. The reversal of 13212042550 is 5524021231.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 18873997 + ... + 18874696.

It is an arithmetic number, because the mean of its divisors is an integer number (1170209514).

Almost surely, 2^13212042550 is an apocalyptic number.

13212042550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13212042550 is an abundant number, since it is smaller than the sum of its proper divisors (14872985786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13212042550 is a wasteful number, since it uses less digits than its factorization.

13212042550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37748712 (or 37748707 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 13212042550 its reverse (5524021231), we get a palindrome (18736063781).

The spelling of 13212042550 in words is "thirteen billion, two hundred twelve million, forty-two thousand, five hundred fifty".