15553480 has 16 divisors (see below), whose sum is σ = 34995420. Its totient is φ = 6221376.

The previous prime is 15553477. The next prime is 15553493. The reversal of 15553480 is 8435551.

It can be written as a sum of positive squares in 2 ways, for example, as 15382084 + 171396 = 3922^2 + 414^2 .

It is a super-2 number, since 2×15553480² = 483821480220800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194379 + ... + 194458.

Almost surely, 2^15553480 is an apocalyptic number.

15553480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15553480 is an abundant number, since it is smaller than the sum of its proper divisors (19441940).

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

15553480 is a wasteful number, since it uses less digits than its factorization.

15553480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388848 (or 388844 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 15553480 is about 3943.7900552641. The cubic root of 15553480 is about 249.6179765296.

It can be divided in two parts, 155 and 53480, that added together give a palindrome (53635).

The spelling of 15553480 in words is "fifteen million, five hundred fifty-three thousand, four hundred eighty".