210280045 has 4 divisors (see below), whose sum is σ = 252336060. Its totient is φ = 168224032.

The previous prime is 210280043. The next prime is 210280051. The reversal of 210280045 is 540082012.

210280045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167495364 + 42784681 = 12942^2 + 6541^2 .

It is a cyclic number.

It is not a de Polignac number, because 210280045 - 2¹ = 210280043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210279998 and 210280025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210280043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21028000 + ... + 21028009.

It is an arithmetic number, because the mean of its divisors is an integer number (63084015).

Almost surely, 2^210280045 is an apocalyptic number.

It is an amenable number.

210280045 is a deficient number, since it is larger than the sum of its proper divisors (42056015).

210280045 is an equidigital number, since it uses as much as digits as its factorization.

210280045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42056014.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 210280045 is about 14501.0359974727. The cubic root of 210280045 is about 594.6562946803.

The spelling of 210280045 in words is "two hundred ten million, two hundred eighty thousand, forty-five".