87156233 has 8 divisors (see below), whose sum is σ = 89232456. Its totient is φ = 85104000.

The previous prime is 87156217. The next prime is 87156241. The reversal of 87156233 is 33265178.

It can be written as a sum of positive squares in 4 ways, for example, as 21270544 + 65885689 = 4612^2 + 8117^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87156233 - 2⁴ = 87156217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87156193 and 87156202.

It is not an unprimeable number, because it can be changed into a prime (87156533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1463 + ... + 13283.

It is an arithmetic number, because the mean of its divisors is an integer number (11154057).

Almost surely, 2^87156233 is an apocalyptic number.

It is an amenable number.

87156233 is a deficient number, since it is larger than the sum of its proper divisors (2076223).

87156233 is a wasteful number, since it uses less digits than its factorization.

87156233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11995.

The product of its digits is 30240, while the sum is 35.

The square root of 87156233 is about 9335.7502644405. The cubic root of 87156233 is about 443.3698433509.

The spelling of 87156233 in words is "eighty-seven million, one hundred fifty-six thousand, two hundred thirty-three".