210249138 has 32 divisors (see below), whose sum is σ = 459677952. Its totient is φ = 63579600.

The previous prime is 210249131. The next prime is 210249191. The reversal of 210249138 is 831942012.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (210249131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31473 + ... + 37563.

It is an arithmetic number, because the mean of its divisors is an integer number (14364936).

Almost surely, 2^210249138 is an apocalyptic number.

210249138 is an abundant number, since it is smaller than the sum of its proper divisors (249428814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210249138 is a wasteful number, since it uses less digits than its factorization.

210249138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6630.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 210249138 is about 14499.9702758316. The cubic root of 210249138 is about 594.6271590220.

The spelling of 210249138 in words is "two hundred ten million, two hundred forty-nine thousand, one hundred thirty-eight".