12551550 has 48 divisors (see below), whose sum is σ = 33962112. Its totient is φ = 3042400.

The previous prime is 12551549. The next prime is 12551557. The reversal of 12551550 is 5515521.

It is a self number, because there is not a number n which added to its sum of digits gives 12551550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12551557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2154 + ... + 5453.

It is an arithmetic number, because the mean of its divisors is an integer number (707544).

Almost surely, 2^12551550 is an apocalyptic number.

12551550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12551550 is an abundant number, since it is smaller than the sum of its proper divisors (21410562).

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

12551550 is a wasteful number, since it uses less digits than its factorization.

12551550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7633 (or 7628 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 12551550 is about 3542.8166760362. The cubic root of 12551550 is about 232.3980359927.

The spelling of 12551550 in words is "twelve million, five hundred fifty-one thousand, five hundred fifty".