15222555 has 12 divisors (see below), whose sum is σ = 26385840. Its totient is φ = 8118672.

The previous prime is 15222547. The next prime is 15222583. The reversal of 15222555 is 55522251.

15222555 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 not a de Polignac number, because 15222555 - 2³ = 15222547 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169095 + ... + 169184.

It is an arithmetic number, because the mean of its divisors is an integer number (2198820).

Almost surely, 2^15222555 is an apocalyptic number.

15222555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15222555 is a deficient number, since it is larger than the sum of its proper divisors (11163285).

15222555 is a wasteful number, since it uses less digits than its factorization.

15222555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338290 (or 338287 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 15222555 is about 3901.6092833599. The cubic root of 15222555 is about 247.8349306933.

The spelling of 15222555 in words is "fifteen million, two hundred twenty-two thousand, five hundred fifty-five".