212252481 has 24 divisors (see below), whose sum is σ = 363365184. Its totient is φ = 121286160.

The previous prime is 212252473. The next prime is 212252501. The reversal of 212252481 is 184252212.

212252481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212252481 - 2³ = 212252473 is a prime.

It is a super-2 number, since 2×212252481² = 90102231381310722, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (212252431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60690 + ... + 64091.

It is an arithmetic number, because the mean of its divisors is an integer number (15140216).

Almost surely, 2^212252481 is an apocalyptic number.

212252481 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212252481 is a deficient number, since it is larger than the sum of its proper divisors (151112703).

212252481 is an equidigital number, since it uses as much as digits as its factorization.

212252481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124803 (or 124791 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 212252481 is about 14568.8874317842. The cubic root of 212252481 is about 596.5098120125.

The spelling of 212252481 in words is "two hundred twelve million, two hundred fifty-two thousand, four hundred eighty-one".