15230212221 has 16 divisors (see below), whose sum is σ = 23329456128. Its totient is φ = 8657410800.

The previous prime is 15230212211. The next prime is 15230212241. The reversal of 15230212221 is 12221203251.

It is not a de Polignac number, because 15230212221 - 2¹³ = 15230204029 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15230212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1894545 + ... + 1902566.

It is an arithmetic number, because the mean of its divisors is an integer number (1458091008).

Almost surely, 2^15230212221 is an apocalyptic number.

It is an amenable number.

15230212221 is a deficient number, since it is larger than the sum of its proper divisors (8099243907).

15230212221 is a wasteful number, since it uses less digits than its factorization.

15230212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3797312.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 15230212221 its reverse (12221203251), we get a palindrome (27451415472).

The spelling of 15230212221 in words is "fifteen billion, two hundred thirty million, two hundred twelve thousand, two hundred twenty-one".