811213056 has 360 divisors, whose sum is σ = 2671099200. Its totient is φ = 243855360.

The previous prime is 811212959. The next prime is 811213057. The reversal of 811213056 is 650312118.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811213057) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11425501 + ... + 11425571.

It is an arithmetic number, because the mean of its divisors is an integer number (7419720).

Almost surely, 2^811213056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 811213056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1335549600).

811213056 is an abundant number, since it is smaller than the sum of its proper divisors (1859886144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811213056 is a wasteful number, since it uses less digits than its factorization.

811213056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 811213056 is about 28481.8021901705. The cubic root of 811213056 is about 932.6348588220.

The spelling of 811213056 in words is "eight hundred eleven million, two hundred thirteen thousand, fifty-six".