87261181 has 8 divisors (see below), whose sum is σ = 99874944. Its totient is φ = 74684400.

The previous prime is 87261173. The next prime is 87261193. The reversal of 87261181 is 18116278.

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

It is not a de Polignac number, because 87261181 - 2³ = 87261173 is a prime.

It is a super-2 number, since 2×87261181² = 15229027419029522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87261101) 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, 3985 + ... + 13798.

It is an arithmetic number, because the mean of its divisors is an integer number (12484368).

Almost surely, 2^87261181 is an apocalyptic number.

It is an amenable number.

87261181 is a deficient number, since it is larger than the sum of its proper divisors (12613763).

87261181 is a wasteful number, since it uses less digits than its factorization.

87261181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18491.

The product of its digits is 5376, while the sum is 34.

The square root of 87261181 is about 9341.3693321697. The cubic root of 87261181 is about 443.5477312378.

The spelling of 87261181 in words is "eighty-seven million, two hundred sixty-one thousand, one hundred eighty-one".