87810225 has 12 divisors (see below), whose sum is σ = 145179696. Its totient is φ = 46832080.

The previous prime is 87810223. The next prime is 87810227. The reversal of 87810225 is 52201878.

It is an interprime number because it is at equal distance from previous prime (87810223) and next prime (87810227).

It is not a de Polignac number, because 87810225 - 2¹ = 87810223 is a prime.

It is a super-2 number, since 2×87810225² = 15421271229101250, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87810221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 585327 + ... + 585476.

It is an arithmetic number, because the mean of its divisors is an integer number (12098308).

Almost surely, 2^87810225 is an apocalyptic number.

It is an amenable number.

87810225 is a deficient number, since it is larger than the sum of its proper divisors (57369471).

87810225 is a wasteful number, since it uses less digits than its factorization.

87810225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170816 (or 1170811 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 87810225 is about 9370.7110189142. The cubic root of 87810225 is about 444.4760487364.

The spelling of 87810225 in words is "eighty-seven million, eight hundred ten thousand, two hundred twenty-five".