211230725 has 12 divisors (see below), whose sum is σ = 262140960. Its totient is φ = 168846000.

The previous prime is 211230713. The next prime is 211230757. The reversal of 211230725 is 527032112.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-211230725 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211230725.

It is a congruent number.

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, 36800 + ... + 42150.

It is an arithmetic number, because the mean of its divisors is an integer number (21845080).

Almost surely, 2^211230725 is an apocalyptic number.

211230725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211230725 is a deficient number, since it is larger than the sum of its proper divisors (50910235).

211230725 is a wasteful number, since it uses less digits than its factorization.

211230725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6940 (or 6935 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 211230725 is about 14533.7787584647. The cubic root of 211230725 is about 595.5510982854.

Adding to 211230725 its reverse (527032112), we get a palindrome (738262837).

The spelling of 211230725 in words is "two hundred eleven million, two hundred thirty thousand, seven hundred twenty-five".