211402401 has 16 divisors (see below), whose sum is σ = 323942400. Its totient is φ = 120124368.

The previous prime is 211402397. The next prime is 211402409. The reversal of 211402401 is 104204112.

It is not a de Polignac number, because 211402401 - 2² = 211402397 is a prime.

It is a super-3 number, since 3×211402401³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (211402409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24361 + ... + 31878.

It is an arithmetic number, because the mean of its divisors is an integer number (20246400).

Almost surely, 2^211402401 is an apocalyptic number.

211402401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211402401 is a deficient number, since it is larger than the sum of its proper divisors (112539999).

211402401 is a wasteful number, since it uses less digits than its factorization.

211402401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56428.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 211402401 is about 14539.6836623085. The cubic root of 211402401 is about 595.7123976483.

Adding to 211402401 its reverse (104204112), we get a palindrome (315606513).

The spelling of 211402401 in words is "two hundred eleven million, four hundred two thousand, four hundred one".