1512052221 has 16 divisors (see below), whose sum is σ = 2041012224. Its totient is φ = 995634864.

The previous prime is 1512052189. The next prime is 1512052237. The reversal of 1512052221 is 1222502151.

It is not a de Polignac number, because 1512052221 - 2⁵ = 1512052189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1512052291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77746 + ... + 95228.

It is an arithmetic number, because the mean of its divisors is an integer number (127563264).

Almost surely, 2^1512052221 is an apocalyptic number.

It is an amenable number.

1512052221 is a deficient number, since it is larger than the sum of its proper divisors (528960003).

1512052221 is a wasteful number, since it uses less digits than its factorization.

1512052221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17840.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1512052221 is about 38885.1156742525. The cubic root of 1512052221 is about 1147.7719231594.

Adding to 1512052221 its reverse (1222502151), we get a palindrome (2734554372).

The spelling of 1512052221 in words is "one billion, five hundred twelve million, fifty-two thousand, two hundred twenty-one".