15551480 has 32 divisors (see below), whose sum is σ = 39990240. Its totient is φ = 5331840.

The previous prime is 15551479. The next prime is 15551483. The reversal of 15551480 is 8415551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15551483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27491 + ... + 28050.

It is an arithmetic number, because the mean of its divisors is an integer number (1249695).

Almost surely, 2^15551480 is an apocalyptic number.

15551480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15551480 is an abundant number, since it is smaller than the sum of its proper divisors (24438760).

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

15551480 is a wasteful number, since it uses less digits than its factorization.

15551480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55559 (or 55555 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

The square root of 15551480 is about 3943.5364839190. The cubic root of 15551480 is about 249.6072767301.

The spelling of 15551480 in words is "fifteen million, five hundred fifty-one thousand, four hundred eighty".