811457201 has 4 divisors (see below), whose sum is σ = 811719012. Its totient is φ = 811195392.

The previous prime is 811457183. The next prime is 811457237. The reversal of 811457201 is 102754118.

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 768620176 + 42837025 = 27724^2 + 6545^2 .

It is a cyclic number.

It is not a de Polignac number, because 811457201 - 2⁶ = 811457137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811447201) 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, 126200 + ... + 132473.

It is an arithmetic number, because the mean of its divisors is an integer number (202929753).

Almost surely, 2^811457201 is an apocalyptic number.

It is an amenable number.

811457201 is a deficient number, since it is larger than the sum of its proper divisors (261811).

811457201 is a wasteful number, since it uses less digits than its factorization.

811457201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261810.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 811457201 is about 28486.0878500366. The cubic root of 811457201 is about 932.7284122549.

The spelling of 811457201 in words is "eight hundred eleven million, four hundred fifty-seven thousand, two hundred one".