15221141 has 4 divisors (see below), whose sum is σ = 16392012. Its totient is φ = 14050272.

The previous prime is 15221099. The next prime is 15221149. The reversal of 15221141 is 14112251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14112251 = 367 ⋅38453.

It can be written as a sum of positive squares in 2 ways, for example, as 5424241 + 9796900 = 2329^2 + 3130^2 .

It is a cyclic number.

It is not a de Polignac number, because 15221141 - 2²² = 11026837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15221149) 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, 585416 + ... + 585441.

It is an arithmetic number, because the mean of its divisors is an integer number (4098003).

Almost surely, 2^15221141 is an apocalyptic number.

It is an amenable number.

15221141 is a deficient number, since it is larger than the sum of its proper divisors (1170871).

15221141 is a wasteful number, since it uses less digits than its factorization.

15221141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170870.

The product of its digits is 80, while the sum is 17.

The square root of 15221141 is about 3901.4280718732. The cubic root of 15221141 is about 247.8272567856.

Adding to 15221141 its reverse (14112251), we get a palindrome (29333392).

The spelling of 15221141 in words is "fifteen million, two hundred twenty-one thousand, one hundred forty-one".