13065550 has 48 divisors (see below), whose sum is σ = 25534080. Its totient is φ = 4969440.

The previous prime is 13065527. The next prime is 13065557. The reversal of 13065550 is 5556031.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13065557) 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, 126799 + ... + 126901.

It is an arithmetic number, because the mean of its divisors is an integer number (531960).

Almost surely, 2^13065550 is an apocalyptic number.

13065550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13065550 is a deficient number, since it is larger than the sum of its proper divisors (12468530).

13065550 is a wasteful number, since it uses less digits than its factorization.

13065550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 13065550 is about 3614.6299948957. The cubic root of 13065550 is about 235.5280114775.

The spelling of 13065550 in words is "thirteen million, sixty-five thousand, five hundred fifty".