153068821 has 4 divisors (see below), whose sum is σ = 153202732. Its totient is φ = 152934912.

The previous prime is 153068819. The next prime is 153068827. The reversal of 153068821 is 128860351.

153068821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46049796 + 107019025 = 6786^2 + 10345^2 .

It is a cyclic number.

It is not a de Polignac number, because 153068821 - 2¹ = 153068819 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 (153068827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65226 + ... + 67531.

It is an arithmetic number, because the mean of its divisors is an integer number (38300683).

Almost surely, 2^153068821 is an apocalyptic number.

It is an amenable number.

153068821 is a deficient number, since it is larger than the sum of its proper divisors (133911).

153068821 is a wasteful number, since it uses less digits than its factorization.

153068821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133910.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 153068821 is about 12372.0984881305. The cubic root of 153068821 is about 534.9283055295.

The spelling of 153068821 in words is "one hundred fifty-three million, sixty-eight thousand, eight hundred twenty-one".