210397229 has 10 divisors (see below), whose sum is σ = 245451630. Its totient is φ = 180338424.

The previous prime is 210397223. The next prime is 210397247. The reversal of 210397229 is 922793012.

It can be written as a sum of positive squares in only one way, i.e., 123721129 + 86676100 = 11123^2 + 9310^2 .

It is a de Polignac number, because none of the positive numbers 2^k-210397229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210397223) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 41414 + ... + 46215.

It is an arithmetic number, because the mean of its divisors is an integer number (24545163).

Almost surely, 2^210397229 is an apocalyptic number.

It is an amenable number.

210397229 is a deficient number, since it is larger than the sum of its proper divisors (35054401).

210397229 is an frugal number, since it uses more digits than its factorization.

210397229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87657 (or 87636 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 210397229 is about 14505.0759736032. The cubic root of 210397229 is about 594.7667367066.

The spelling of 210397229 in words is "two hundred ten million, three hundred ninety-seven thousand, two hundred twenty-nine".