210015145 has 8 divisors (see below), whose sum is σ = 258829704. Its totient is φ = 163471104.

The previous prime is 210015121. The next prime is 210015163. The reversal of 210015145 is 541510012.

It can be written as a sum of positive squares in 4 ways, for example, as 91030681 + 118984464 = 9541^2 + 10908^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210015145 is a prime.

It is a super-2 number, since 2×210015145² = 88212722258742050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567424 + ... + 567793.

It is an arithmetic number, because the mean of its divisors is an integer number (32353713).

Almost surely, 2^210015145 is an apocalyptic number.

It is an amenable number.

210015145 is a deficient number, since it is larger than the sum of its proper divisors (48814559).

210015145 is a wasteful number, since it uses less digits than its factorization.

210015145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135259.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 210015145 is about 14491.8992889131. The cubic root of 210015145 is about 594.4064839325.

Adding to 210015145 its reverse (541510012), we get a palindrome (751525157).

The spelling of 210015145 in words is "two hundred ten million, fifteen thousand, one hundred forty-five".