15225554 has 4 divisors (see below), whose sum is σ = 22838334. Its totient is φ = 7612776.

The previous prime is 15225547. The next prime is 15225559. The reversal of 15225554 is 45552251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45552251 = 71 ⋅641581.

It can be written as a sum of positive squares in only one way, i.e., 14235529 + 990025 = 3773^2 + 995^2 .

It is not an unprimeable number, because it can be changed into a prime (15225559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3806387 + ... + 3806390.

Almost surely, 2^15225554 is an apocalyptic number.

15225554 is a deficient number, since it is larger than the sum of its proper divisors (7612780).

15225554 is an equidigital number, since it uses as much as digits as its factorization.

15225554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612779.

The product of its digits is 10000, while the sum is 29.

The square root of 15225554 is about 3901.9935930240. The cubic root of 15225554 is about 247.8512049686.

The spelling of 15225554 in words is "fifteen million, two hundred twenty-five thousand, five hundred fifty-four".