211455252 has 48 divisors (see below), whose sum is σ = 560978880. Its totient is φ = 68844384.

The previous prime is 211455229. The next prime is 211455263. The reversal of 211455252 is 252554112.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18123 + ... + 27410.

It is an arithmetic number, because the mean of its divisors is an integer number (11687060).

Almost surely, 2^211455252 is an apocalyptic number.

It is an amenable number.

211455252 is an abundant number, since it is smaller than the sum of its proper divisors (349523628).

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

211455252 is a wasteful number, since it uses less digits than its factorization.

211455252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45589 (or 45581 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 211455252 is about 14541.5010229343. The cubic root of 211455252 is about 595.7620365873.

The spelling of 211455252 in words is "two hundred eleven million, four hundred fifty-five thousand, two hundred fifty-two".