210155252 has 6 divisors (see below), whose sum is σ = 367771698. Its totient is φ = 105077624.

The previous prime is 210155221. The next prime is 210155261. The reversal of 210155252 is 252551012.

It can be written as a sum of positive squares in only one way, i.e., 207244816 + 2910436 = 14396^2 + 1706^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26269403 + ... + 26269410.

It is an arithmetic number, because the mean of its divisors is an integer number (61295283).

Almost surely, 2^210155252 is an apocalyptic number.

It is an amenable number.

210155252 is a deficient number, since it is larger than the sum of its proper divisors (157616446).

210155252 is a wasteful number, since it uses less digits than its factorization.

210155252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52538817 (or 52538815 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 210155252 is about 14496.7324594200. The cubic root of 210155252 is about 594.5386363010.

The spelling of 210155252 in words is "two hundred ten million, one hundred fifty-five thousand, two hundred fifty-two".