870880221 has 16 divisors (see below), whose sum is σ = 1321662720. Its totient is φ = 566425440.

The previous prime is 870880201. The next prime is 870880229. The reversal of 870880221 is 122088078.

It is not a de Polignac number, because 870880221 - 2¹³ = 870872029 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870880229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392245 + ... + 394458.

It is an arithmetic number, because the mean of its divisors is an integer number (82603920).

Almost surely, 2^870880221 is an apocalyptic number.

It is an amenable number.

870880221 is a deficient number, since it is larger than the sum of its proper divisors (450782499).

870880221 is a wasteful number, since it uses less digits than its factorization.

870880221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786753 (or 786747 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 870880221 is about 29510.6797786835. The cubic root of 870880221 is about 954.9621143016.

The spelling of 870880221 in words is "eight hundred seventy million, eight hundred eighty thousand, two hundred twenty-one".