855321601 has 4 divisors (see below), whose sum is σ = 855725104. Its totient is φ = 854918100.

The previous prime is 855321581. The next prime is 855321611. The reversal of 855321601 is 106123558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 855321601 - 2¹⁹ = 854797313 is a prime.

It is a super-2 number, since 2×855321601² = 1463150082274406402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855321611) 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, 198555 + ... + 202816.

It is an arithmetic number, because the mean of its divisors is an integer number (213931276).

Almost surely, 2^855321601 is an apocalyptic number.

It is an amenable number.

855321601 is a deficient number, since it is larger than the sum of its proper divisors (403503).

855321601 is a wasteful number, since it uses less digits than its factorization.

855321601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403502.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 855321601 is about 29245.8817784658. The cubic root of 855321601 is about 949.2409822825.

The spelling of 855321601 in words is "eight hundred fifty-five million, three hundred twenty-one thousand, six hundred one".