158464521 has 6 divisors (see below), whose sum is σ = 228893210. Its totient is φ = 105643008.

The previous prime is 158464507. The next prime is 158464567. The reversal of 158464521 is 125464851.

It is a happy number.

158464521 is a `hidden beast` number, since 1 + 5 + 8 + 4 + 645 + 2 + 1 = 666.

158464521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 143137296 + 15327225 = 11964^2 + 3915^2 .

It is not a de Polignac number, because 158464521 - 2⁷ = 158464393 is a prime.

It is a super-2 number, since 2×158464521² = 50222008831518882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158464571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8803576 + ... + 8803593.

Almost surely, 2^158464521 is an apocalyptic number.

It is an amenable number.

158464521 is a deficient number, since it is larger than the sum of its proper divisors (70428689).

158464521 is a wasteful number, since it uses less digits than its factorization.

158464521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17607175 (or 17607172 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 158464521 is about 12588.2691820599. The cubic root of 158464521 is about 541.1413001331.

The spelling of 158464521 in words is "one hundred fifty-eight million, four hundred sixty-four thousand, five hundred twenty-one".