211020045 has 32 divisors (see below), whose sum is σ = 345108864. Its totient is φ = 110073600.

The previous prime is 211020001. The next prime is 211020053. The reversal of 211020045 is 540020112.

211020045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211020045 - 2⁸ = 211019789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192519 + ... + 193611.

It is an arithmetic number, because the mean of its divisors is an integer number (10784652).

Almost surely, 2^211020045 is an apocalyptic number.

It is an amenable number.

211020045 is a deficient number, since it is larger than the sum of its proper divisors (134088819).

211020045 is a wasteful number, since it uses less digits than its factorization.

211020045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 211020045 is about 14526.5290073025. The cubic root of 211020045 is about 595.3530329660.

Adding to 211020045 its reverse (540020112), we get a palindrome (751040157).

It can be divided in two parts, 2110 and 20045, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 211020045 in words is "two hundred eleven million, twenty thousand, forty-five".