210540730 has 32 divisors (see below), whose sum is σ = 397529856. Its totient is φ = 80190144.

The previous prime is 210540721. The next prime is 210540739. The reversal of 210540730 is 37045012.

It is an interprime number because it is at equal distance from previous prime (210540721) and next prime (210540739).

It is not an unprimeable number, because it can be changed into a prime (210540739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11337 + ... + 23443.

It is an arithmetic number, because the mean of its divisors is an integer number (12422808).

Almost surely, 2^210540730 is an apocalyptic number.

210540730 is a deficient number, since it is larger than the sum of its proper divisors (186989126).

210540730 is a wasteful number, since it uses less digits than its factorization.

210540730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12198.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 210540730 is about 14510.0217091499. The cubic root of 210540730 is about 594.9019257885.

Adding to 210540730 its reverse (37045012), we get a palindrome (247585742).

The spelling of 210540730 in words is "two hundred ten million, five hundred forty thousand, seven hundred thirty".