211223223040 has 72 divisors (see below), whose sum is σ = 510955301808. Its totient is φ = 83652710400.

The previous prime is 211223223031. The next prime is 211223223053. The reversal of 211223223040 is 40322322112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687642 + ... + 946201.

It is an arithmetic number, because the mean of its divisors is an integer number (7096601414).

Almost surely, 2^211223223040 is an apocalyptic number.

211223223040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211223223040 is an abundant number, since it is smaller than the sum of its proper divisors (299732078768).

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

211223223040 is a wasteful number, since it uses less digits than its factorization.

211223223040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633965 (or 1633951 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 211223223040 its reverse (40322322112), we get a palindrome (251545545152).

The spelling of 211223223040 in words is "two hundred eleven billion, two hundred twenty-three million, two hundred twenty-three thousand, forty".