87213451 has 8 divisors (see below), whose sum is σ = 99447264. Its totient is φ = 75768960.

The previous prime is 87213443. The next prime is 87213457. The reversal of 87213451 is 15431278.

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 87213451 - 2³ = 87213443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87213457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197095 + ... + 197536.

It is an arithmetic number, because the mean of its divisors is an integer number (12430908).

Almost surely, 2^87213451 is an apocalyptic number.

87213451 is a deficient number, since it is larger than the sum of its proper divisors (12233813).

87213451 is a wasteful number, since it uses less digits than its factorization.

87213451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394661.

The product of its digits is 6720, while the sum is 31.

The square root of 87213451 is about 9338.8142180900. The cubic root of 87213451 is about 443.4668461138.

The spelling of 87213451 in words is "eighty-seven million, two hundred thirteen thousand, four hundred fifty-one".