864210553 has 4 divisors (see below), whose sum is σ = 871858548. Its totient is φ = 856562560.

The previous prime is 864210541. The next prime is 864210593. The reversal of 864210553 is 355012468.

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

It can be written as a sum of positive squares in 2 ways, for example, as 254466304 + 609744249 = 15952^2 + 24693^2 .

It is a cyclic number.

It is not a de Polignac number, because 864210553 - 2¹⁷ = 864079481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864210593) 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, 3823828 + ... + 3824053.

It is an arithmetic number, because the mean of its divisors is an integer number (217964637).

Almost surely, 2^864210553 is an apocalyptic number.

It is an amenable number.

864210553 is a deficient number, since it is larger than the sum of its proper divisors (7647995).

864210553 is a wasteful number, since it uses less digits than its factorization.

864210553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7647994.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 864210553 is about 29397.4582744835. The cubic root of 864210553 is about 952.5179934279.

The spelling of 864210553 in words is "eight hundred sixty-four million, two hundred ten thousand, five hundred fifty-three".