211421532 has 48 divisors (see below), whose sum is σ = 565673472. Its totient is φ = 60204480.

The previous prime is 211421521. The next prime is 211421549. The reversal of 211421532 is 235124112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 211421499 and 211421508.

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, 22078 + ... + 30170.

It is an arithmetic number, because the mean of its divisors is an integer number (11784864).

Almost surely, 2^211421532 is an apocalyptic number.

It is an amenable number.

211421532 is an abundant number, since it is smaller than the sum of its proper divisors (354251940).

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

211421532 is a wasteful number, since it uses less digits than its factorization.

211421532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8418 (or 8416 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 211421532 is about 14540.3415365665. The cubic root of 211421532 is about 595.7303669020.

Adding to 211421532 its reverse (235124112), we get a palindrome (446545644).

The spelling of 211421532 in words is "two hundred eleven million, four hundred twenty-one thousand, five hundred thirty-two".