152100821 has 16 divisors (see below), whose sum is σ = 159629184. Its totient is φ = 144794304.

The previous prime is 152100811. The next prime is 152100869. The reversal of 152100821 is 128001251.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 152100821 - 2¹⁰ = 152099797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 152100793 and 152100802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152100811) 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, 407591 + ... + 407963.

It is an arithmetic number, because the mean of its divisors is an integer number (9976824).

Almost surely, 2^152100821 is an apocalyptic number.

It is an amenable number.

152100821 is a deficient number, since it is larger than the sum of its proper divisors (7528363).

152100821 is a wasteful number, since it uses less digits than its factorization.

152100821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 152100821 is about 12332.9161596112. The cubic root of 152100821 is about 533.7982996839.

The spelling of 152100821 in words is "one hundred fifty-two million, one hundred thousand, eight hundred twenty-one".