212135454 has 12 divisors (see below), whose sum is σ = 459626856. Its totient is φ = 70711812.

The previous prime is 212135453. The next prime is 212135459. The reversal of 212135454 is 454531212.

It is a super-2 number, since 2×212135454² = 90002901687572232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212135453) 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, 5892634 + ... + 5892669.

It is an arithmetic number, because the mean of its divisors is an integer number (38302238).

Almost surely, 2^212135454 is an apocalyptic number.

212135454 is an abundant number, since it is smaller than the sum of its proper divisors (247491402).

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

212135454 is a wasteful number, since it uses less digits than its factorization.

212135454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11785311 (or 11785308 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 212135454 is about 14564.8705452537. The cubic root of 212135454 is about 596.4001618024.

Adding to 212135454 its reverse (454531212), we get a palindrome (666666666).

The spelling of 212135454 in words is "two hundred twelve million, one hundred thirty-five thousand, four hundred fifty-four".