212500401520 has 40 divisors (see below), whose sum is σ = 538978293360. Its totient is φ = 77272872960.

The previous prime is 212500401511. The next prime is 212500401569. The reversal of 212500401520 is 25104005212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×212500401520² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 212500401491 and 212500401500.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 120737985 + ... + 120739744.

It is an arithmetic number, because the mean of its divisors is an integer number (13474457334).

Almost surely, 2^212500401520 is an apocalyptic number.

212500401520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212500401520 is an abundant number, since it is smaller than the sum of its proper divisors (326477891840).

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

212500401520 is a wasteful number, since it uses less digits than its factorization.

212500401520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241477753 (or 241477747 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 212500401520 its reverse (25104005212), we get a palindrome (237604406732).

The spelling of 212500401520 in words is "two hundred twelve billion, five hundred million, four hundred one thousand, five hundred twenty".