87554213 has 4 divisors (see below), whose sum is σ = 87572940. Its totient is φ = 87535488.

The previous prime is 87554197. The next prime is 87554227. The reversal of 87554213 is 31245578.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 57501889 + 30052324 = 7583^2 + 5482^2 .

It is a cyclic number.

It is not a de Polignac number, because 87554213 - 2⁴ = 87554197 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 (87554713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4181 + ... + 13877.

It is an arithmetic number, because the mean of its divisors is an integer number (21893235).

Almost surely, 2^87554213 is an apocalyptic number.

It is an amenable number.

87554213 is a deficient number, since it is larger than the sum of its proper divisors (18727).

87554213 is an equidigital number, since it uses as much as digits as its factorization.

87554213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18726.

The product of its digits is 33600, while the sum is 35.

The square root of 87554213 is about 9357.0408249617. The cubic root of 87554213 is about 444.0436694461.

The spelling of 87554213 in words is "eighty-seven million, five hundred fifty-four thousand, two hundred thirteen".