15551265 has 8 divisors (see below), whose sum is σ = 24882048. Its totient is φ = 8294000.

The previous prime is 15551233. The next prime is 15551267. The reversal of 15551265 is 56215551.

15551265 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15551265 - 2⁵ = 15551233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15551267) 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, 518361 + ... + 518390.

It is an arithmetic number, because the mean of its divisors is an integer number (3110256).

Almost surely, 2^15551265 is an apocalyptic number.

15551265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15551265 is a deficient number, since it is larger than the sum of its proper divisors (9330783).

15551265 is a wasteful number, since it uses less digits than its factorization.

15551265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036759.

The product of its digits is 7500, while the sum is 30.

The square root of 15551265 is about 3943.5092240288. The cubic root of 15551265 is about 249.6061264471.

The spelling of 15551265 in words is "fifteen million, five hundred fifty-one thousand, two hundred sixty-five".