152421213 has 24 divisors (see below), whose sum is σ = 237165600. Its totient is φ = 86819040.

The previous prime is 152421121. The next prime is 152421223. The reversal of 152421213 is 312124251.

152421213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 152421213 - 2¹⁰ = 152420189 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 152421213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152421223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49818 + ... + 52788.

It is an arithmetic number, because the mean of its divisors is an integer number (9881900).

Almost surely, 2^152421213 is an apocalyptic number.

It is an amenable number.

152421213 is a deficient number, since it is larger than the sum of its proper divisors (84744387).

152421213 is a wasteful number, since it uses less digits than its factorization.

152421213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337 (or 3330 counting only the distinct ones).

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

The square root of 152421213 is about 12345.8986307194. The cubic root of 152421213 is about 534.1728423926.

Adding to 152421213 its reverse (312124251), we get a palindrome (464545464).

The spelling of 152421213 in words is "one hundred fifty-two million, four hundred twenty-one thousand, two hundred thirteen".