210401225 has 6 divisors (see below), whose sum is σ = 260897550. Its totient is φ = 168320960.

The previous prime is 210401221. The next prime is 210401237. The reversal of 210401225 is 522104012.

It can be written as a sum of positive squares in 3 ways, for example, as 383161 + 210018064 = 619^2 + 14492^2 .

It is not a de Polignac number, because 210401225 - 2² = 210401221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210401221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4208000 + ... + 4208049.

It is an arithmetic number, because the mean of its divisors is an integer number (43482925).

Almost surely, 2^210401225 is an apocalyptic number.

210401225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

210401225 is a deficient number, since it is larger than the sum of its proper divisors (50496325).

210401225 is an equidigital number, since it uses as much as digits as its factorization.

210401225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8416059 (or 8416054 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 210401225 is about 14505.2137178326. The cubic root of 210401225 is about 594.7705020807.

Adding to 210401225 its reverse (522104012), we get a palindrome (732505237).

The spelling of 210401225 in words is "two hundred ten million, four hundred one thousand, two hundred twenty-five".