211225300722 has 30 divisors (see below), whose sum is σ = 473314244733. Its totient is φ = 70406483688.

The previous prime is 211225300681. The next prime is 211225300733. The reversal of 211225300722 is 227003522112.

211225300722 is a `hidden beast` number, since 2 + 1 + 122 + 530 + 0 + 7 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 112277936241 + 98947364481 = 335079^2 + 314559^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=324981.

It is a super-2 number, since 2×211225300722² (a number of 23 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 5831604 + ... + 5867712.

Almost surely, 2^211225300722 is an apocalyptic number.

211225300722 is an abundant number, since it is smaller than the sum of its proper divisors (262088944011).

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

211225300722 is an frugal number, since it uses more digits than its factorization.

211225300722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72232 (or 36114 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

Adding to 211225300722 its reverse (227003522112), we get a palindrome (438228822834).

The spelling of 211225300722 in words is "two hundred eleven billion, two hundred twenty-five million, three hundred thousand, seven hundred twenty-two".