158320431025 has 9 divisors (see below), whose sum is σ = 196319801451. Its totient is φ = 126654753240.

The previous prime is 158320431013. The next prime is 158320431029. The reversal of 158320431025 is 520134023851.

The square root of 158320431025 is 397895.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 56995355169 + 101325075856 = 238737^2 + 318316^2 .

It is not a de Polignac number, because 158320431025 - 2⁷ = 158320430897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158320431029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1949686 + ... + 2029264.

Almost surely, 2^158320431025 is an apocalyptic number.

158320431025 is the 397895-th square number.

158320431025 is the 198948-th centered octagonal number.

It is an amenable number.

158320431025 is a deficient number, since it is larger than the sum of its proper divisors (37999370426).

158320431025 is an frugal number, since it uses more digits than its factorization.

158320431025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159168 (or 79584 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 158320431025 its reverse (520134023851), we get a palindrome (678454454876).

The spelling of 158320431025 in words is "one hundred fifty-eight billion, three hundred twenty million, four hundred thirty-one thousand, twenty-five".