211424425 has 12 divisors (see below), whose sum is σ = 265759900. Its totient is φ = 166821120.

The previous prime is 211424417. The next prime is 211424431. The reversal of 211424425 is 524424112.

It can be written as a sum of positive squares in 6 ways, for example, as 826281 + 210598144 = 909^2 + 14512^2 .

It is not a de Polignac number, because 211424425 - 2³ = 211424417 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 211424425.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56100 + ... + 59749.

Almost surely, 2^211424425 is an apocalyptic number.

211424425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211424425 is a deficient number, since it is larger than the sum of its proper divisors (54335475).

211424425 is a wasteful number, since it uses less digits than its factorization.

211424425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115932 (or 115927 counting only the distinct ones).

The product of its digits is 2560, while the sum is 25.

The square root of 211424425 is about 14540.4410180709. The cubic root of 211424425 is about 595.7330841278.

Adding to 211424425 its reverse (524424112), we get a palindrome (735848537).

The spelling of 211424425 in words is "two hundred eleven million, four hundred twenty-four thousand, four hundred twenty-five".