211402420 has 48 divisors (see below), whose sum is σ = 456503040. Its totient is φ = 82203264.

The previous prime is 211402409. The next prime is 211402421. The reversal of 211402420 is 24204112.

It is a junction number, because it is equal to n+sod(n) for n = 211402394 and 211402403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211402421) 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, 104862 + ... + 106858.

It is an arithmetic number, because the mean of its divisors is an integer number (9510480).

Almost surely, 2^211402420 is an apocalyptic number.

211402420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211402420 is an abundant number, since it is smaller than the sum of its proper divisors (245100620).

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

211402420 is a wasteful number, since it uses less digits than its factorization.

211402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2152 (or 2150 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 211402420 is about 14539.6843156927. The cubic root of 211402420 is about 595.7124154951.

Adding to 211402420 its reverse (24204112), we get a palindrome (235606532).

The spelling of 211402420 in words is "two hundred eleven million, four hundred two thousand, four hundred twenty".