158232203821 has 2 divisors, whose sum is σ = 158232203822. Its totient is φ = 158232203820.

The previous prime is 158232203803. The next prime is 158232203837. The reversal of 158232203821 is 128302232851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101849701321 + 56382502500 = 319139^2 + 237450^2 .

It is a cyclic number.

It is not a de Polignac number, because 158232203821 - 2³³ = 149642269229 is a prime.

It is a super-3 number, since 3×158232203821³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158232203891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79116101910 + 79116101911.

It is an arithmetic number, because the mean of its divisors is an integer number (79116101911).

Almost surely, 2^158232203821 is an apocalyptic number.

It is an amenable number.

158232203821 is a deficient number, since it is larger than the sum of its proper divisors (1).

158232203821 is an equidigital number, since it uses as much as digits as its factorization.

158232203821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 158232203821 in words is "one hundred fifty-eight billion, two hundred thirty-two million, two hundred three thousand, eight hundred twenty-one".