87273551 has 4 divisors (see below), whose sum is σ = 87303504. Its totient is φ = 87243600.

The previous prime is 87273547. The next prime is 87273607. The reversal of 87273551 is 15537278.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87273551 - 2² = 87273547 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 (87276551) 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, 10070 + ... + 16611.

It is an arithmetic number, because the mean of its divisors is an integer number (21825876).

Almost surely, 2^87273551 is an apocalyptic number.

87273551 is a deficient number, since it is larger than the sum of its proper divisors (29953).

87273551 is a wasteful number, since it uses less digits than its factorization.

87273551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29952.

The product of its digits is 58800, while the sum is 38.

The square root of 87273551 is about 9342.0314172026. The cubic root of 87273551 is about 443.5686891106.

The spelling of 87273551 in words is "eighty-seven million, two hundred seventy-three thousand, five hundred fifty-one".