158815397 has 16 divisors (see below), whose sum is σ = 180714240. Its totient is φ = 138516672.

The previous prime is 158815381. The next prime is 158815403. The reversal of 158815397 is 793518851.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 158815397 - 2⁴ = 158815381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158815997) 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, 13238 + ... + 22200.

It is an arithmetic number, because the mean of its divisors is an integer number (11294640).

Almost surely, 2^158815397 is an apocalyptic number.

It is an amenable number.

158815397 is a deficient number, since it is larger than the sum of its proper divisors (21898843).

158815397 is a wasteful number, since it uses less digits than its factorization.

158815397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9052.

The product of its digits is 302400, while the sum is 47.

The square root of 158815397 is about 12602.1981019186. The cubic root of 158815397 is about 541.5404084528.

The spelling of 158815397 in words is "one hundred fifty-eight million, eight hundred fifteen thousand, three hundred ninety-seven".