15151221223 has 8 divisors (see below), whose sum is σ = 15514433280. Its totient is φ = 14789711160.

The previous prime is 15151221203. The next prime is 15151221233. The reversal of 15151221223 is 32212215151.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15151221223 - 2²⁵ = 15117666791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15151221203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407473 + ... + 443098.

It is an arithmetic number, because the mean of its divisors is an integer number (1939304160).

Almost surely, 2^15151221223 is an apocalyptic number.

15151221223 is a deficient number, since it is larger than the sum of its proper divisors (363212057).

15151221223 is an equidigital number, since it uses as much as digits as its factorization.

15151221223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850997.

The product of its digits is 1200, while the sum is 25.

Adding to 15151221223 its reverse (32212215151), we get a palindrome (47363436374).

The spelling of 15151221223 in words is "fifteen billion, one hundred fifty-one million, two hundred twenty-one thousand, two hundred twenty-three".