15554149 has 4 divisors (see below), whose sum is σ = 16750636. Its totient is φ = 14357664.

The previous prime is 15554137. The next prime is 15554177. The reversal of 15554149 is 94145551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5832225 + 9721924 = 2415^2 + 3118^2 .

It is a cyclic number.

It is not a de Polignac number, because 15554149 - 2¹¹ = 15552101 is a prime.

It is a super-2 number, since 2×15554149² = 483863102228402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15554249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598224 + ... + 598249.

It is an arithmetic number, because the mean of its divisors is an integer number (4187659).

Almost surely, 2^15554149 is an apocalyptic number.

It is an amenable number.

15554149 is a deficient number, since it is larger than the sum of its proper divisors (1196487).

15554149 is a wasteful number, since it uses less digits than its factorization.

15554149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196486.

The product of its digits is 18000, while the sum is 34.

The square root of 15554149 is about 3943.8748712402. The cubic root of 15554149 is about 249.6215554078.

The spelling of 15554149 in words is "fifteen million, five hundred fifty-four thousand, one hundred forty-nine".