210215742 has 16 divisors (see below), whose sum is σ = 458652672. Its totient is φ = 63701720.

The previous prime is 210215741. The next prime is 210215749. The reversal of 210215742 is 247512012.

210215742 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×210215742² = 88381316369221128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210215741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1592478 + ... + 1592609.

It is an arithmetic number, because the mean of its divisors is an integer number (28665792).

Almost surely, 2^210215742 is an apocalyptic number.

210215742 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

210215742 is an abundant number, since it is smaller than the sum of its proper divisors (248436930).

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

210215742 is a wasteful number, since it uses less digits than its factorization.

210215742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3185103.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 210215742 is about 14498.8186415308. The cubic root of 210215742 is about 594.5956738035.

Adding to 210215742 its reverse (247512012), we get a palindrome (457727754).

The spelling of 210215742 in words is "two hundred ten million, two hundred fifteen thousand, seven hundred forty-two".