212140403 has 6 divisors (see below), whose sum is σ = 215175492. Its totient is φ = 209147540.

The previous prime is 212140391. The next prime is 212140421. The reversal of 212140403 is 304041212.

It is not a de Polignac number, because 212140403 - 2⁴ = 212140387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212140303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16001 + ... + 26082.

It is an arithmetic number, because the mean of its divisors is an integer number (35862582).

Almost surely, 2^212140403 is an apocalyptic number.

212140403 is a deficient number, since it is larger than the sum of its proper divisors (3035089).

212140403 is an frugal number, since it uses more digits than its factorization.

212140403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42225 (or 42154 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212140403 is about 14565.0404393534. The cubic root of 212140403 is about 596.4047996590.

Adding to 212140403 its reverse (304041212), we get a palindrome (516181615).

It can be divided in two parts, 2121 and 40403, that added together give a palindrome (42524).

The spelling of 212140403 in words is "two hundred twelve million, one hundred forty thousand, four hundred three".