15227121 has 48 divisors (see below), whose sum is σ = 26681984. Its totient is φ = 7520256.

The previous prime is 15227119. The next prime is 15227123. The reversal of 15227121 is 12172251.

15227121 is digitally balanced in base 2, base 4 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15227119) and next prime (15227123).

It is not a de Polignac number, because 15227121 - 2¹ = 15227119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

15227121 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (15227123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78801 + ... + 78993.

Almost surely, 2^15227121 is an apocalyptic number.

It is an amenable number.

15227121 is a deficient number, since it is larger than the sum of its proper divisors (11454863).

15227121 is a wasteful number, since it uses less digits than its factorization.

15227121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250 (or 233 counting only the distinct ones).

The product of its digits is 280, while the sum is 21.

The square root of 15227121 is about 3902.1943826519. The cubic root of 15227121 is about 247.8597075495.

Adding to 15227121 its reverse (12172251), we get a palindrome (27399372).

The spelling of 15227121 in words is "fifteen million, two hundred twenty-seven thousand, one hundred twenty-one".