211452945 has 48 divisors (see below), whose sum is σ = 375532416. Its totient is φ = 101516800.

The previous prime is 211452937. The next prime is 211452947. The reversal of 211452945 is 549254112.

It is not a de Polignac number, because 211452945 - 2³ = 211452937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (211452947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204580 + ... + 205610.

It is an arithmetic number, because the mean of its divisors is an integer number (7823592).

Almost surely, 2^211452945 is an apocalyptic number.

It is an amenable number.

211452945 is a deficient number, since it is larger than the sum of its proper divisors (164079471).

211452945 is a wasteful number, since it uses less digits than its factorization.

211452945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1163 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

The square root of 211452945 is about 14541.4216980321. The cubic root of 211452945 is about 595.7598699697.

It can be divided in two parts, 21145 and 2945, that added together give a triangular number (24090 = T₂₁₉).

The spelling of 211452945 in words is "two hundred eleven million, four hundred fifty-two thousand, nine hundred forty-five".