64158233 has 4 divisors (see below), whose sum is σ = 64176420. Its totient is φ = 64140048.

The previous prime is 64158223. The next prime is 64158271. The reversal of 64158233 is 33285146.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33285146 = 2 ⋅16642573.

It can be written as a sum of positive squares in 2 ways, for example, as 3193369 + 60964864 = 1787^2 + 7808^2 .

It is a cyclic number.

It is not a de Polignac number, because 64158233 - 2¹⁴ = 64141849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64158233.

It is not an unprimeable number, because it can be changed into a prime (64158223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1910 + ... + 11487.

It is an arithmetic number, because the mean of its divisors is an integer number (16044105).

Almost surely, 2^64158233 is an apocalyptic number.

It is an amenable number.

64158233 is a deficient number, since it is larger than the sum of its proper divisors (18187).

64158233 is a wasteful number, since it uses less digits than its factorization.

64158233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18186.

The product of its digits is 17280, while the sum is 32.

The square root of 64158233 is about 8009.8834573295. The cubic root of 64158233 is about 400.3293807796.

The spelling of 64158233 in words is "sixty-four million, one hundred fifty-eight thousand, two hundred thirty-three".