211055421 has 8 divisors (see below), whose sum is σ = 281534400. Its totient is φ = 140640032.

The previous prime is 211055419. The next prime is 211055423. The reversal of 211055421 is 124550112.

It is an interprime number because it is at equal distance from previous prime (211055419) and next prime (211055423).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211055421 - 2¹ = 211055419 is a prime.

It is a super-3 number, since 3×211055421³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211055423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7521 + ... + 21878.

It is an arithmetic number, because the mean of its divisors is an integer number (35191800).

Almost surely, 2^211055421 is an apocalyptic number.

It is an amenable number.

211055421 is a deficient number, since it is larger than the sum of its proper divisors (70478979).

211055421 is a wasteful number, since it uses less digits than its factorization.

211055421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31795.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 211055421 is about 14527.7465905763. The cubic root of 211055421 is about 595.3862999985.

The spelling of 211055421 in words is "two hundred eleven million, fifty-five thousand, four hundred twenty-one".