87881051 has 4 divisors (see below), whose sum is σ = 87901632. Its totient is φ = 87860472.

The previous prime is 87881033. The next prime is 87881069. The reversal of 87881051 is 15018878.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87881033) and next prime (87881069).

It is a cyclic number.

It is not a de Polignac number, because 87881051 - 2¹⁰ = 87880027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87880996 and 87881014.

It is not an unprimeable number, because it can be changed into a prime (87881071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220 + ... + 13313.

It is an arithmetic number, because the mean of its divisors is an integer number (21975408).

Almost surely, 2^87881051 is an apocalyptic number.

87881051 is a deficient number, since it is larger than the sum of its proper divisors (20581).

87881051 is a wasteful number, since it uses less digits than its factorization.

87881051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20580.

The product of its (nonzero) digits is 17920, while the sum is 38.

The square root of 87881051 is about 9374.4893727605. The cubic root of 87881051 is about 444.5955185004.

The spelling of 87881051 in words is "eighty-seven million, eight hundred eighty-one thousand, fifty-one".