87842551 has 8 divisors (see below), whose sum is σ = 90476480. Its totient is φ = 85222368.

The previous prime is 87842533. The next prime is 87842569. The reversal of 87842551 is 15524878.

It is an interprime number because it is at equal distance from previous prime (87842533) and next prime (87842569).

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 87842551 - 2⁷ = 87842423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87843551) 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, 10345 + ... + 16813.

It is an arithmetic number, because the mean of its divisors is an integer number (11309560).

Almost surely, 2^87842551 is an apocalyptic number.

87842551 is a deficient number, since it is larger than the sum of its proper divisors (2633929).

87842551 is a wasteful number, since it uses less digits than its factorization.

87842551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6873.

The product of its digits is 89600, while the sum is 40.

The square root of 87842551 is about 9372.4357026335. The cubic root of 87842551 is about 444.5305844125.

The spelling of 87842551 in words is "eighty-seven million, eight hundred forty-two thousand, five hundred fifty-one".