211421475 has 48 divisors (see below), whose sum is σ = 390079200. Its totient is φ = 112268160.

The previous prime is 211421473. The next prime is 211421477. The reversal of 211421475 is 574124112.

It is an interprime number because it is at equal distance from previous prime (211421473) and next prime (211421477).

It is not a de Polignac number, because 211421475 - 2¹ = 211421473 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (211421473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 197241 + ... + 198309.

It is an arithmetic number, because the mean of its divisors is an integer number (8126650).

Almost surely, 2^211421475 is an apocalyptic number.

211421475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

211421475 is a deficient number, since it is larger than the sum of its proper divisors (178657725).

211421475 is a wasteful number, since it uses less digits than its factorization.

211421475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381 (or 1370 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 211421475 is about 14540.3395765023. The cubic root of 211421475 is about 595.7303133650.

Adding to 211421475 its reverse (574124112), we get a palindrome (785545587).

The spelling of 211421475 in words is "two hundred eleven million, four hundred twenty-one thousand, four hundred seventy-five".