152011221 has 16 divisors (see below), whose sum is σ = 205453248. Its totient is φ = 99964800.

The previous prime is 152011201. The next prime is 152011241. The reversal of 152011221 is 122110251.

It is an interprime number because it is at equal distance from previous prime (152011201) and next prime (152011241).

It is not a de Polignac number, because 152011221 - 2¹¹ = 152009173 is a prime.

It is a super-2 number, since 2×152011221² = 46214822619821682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 152011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152011201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70065 + ... + 72201.

It is an arithmetic number, because the mean of its divisors is an integer number (12840828).

Almost surely, 2^152011221 is an apocalyptic number.

It is an amenable number.

152011221 is a deficient number, since it is larger than the sum of its proper divisors (53442027).

152011221 is a wasteful number, since it uses less digits than its factorization.

152011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 152011221 is about 12329.2830691813. The cubic root of 152011221 is about 533.6934619366.

Adding to 152011221 its reverse (122110251), we get a palindrome (274121472).

The spelling of 152011221 in words is "one hundred fifty-two million, eleven thousand, two hundred twenty-one".