213434451 has 12 divisors (see below), whose sum is σ = 309435360. Its totient is φ = 141762960.

The previous prime is 213434401. The next prime is 213434471. The reversal of 213434451 is 154434312.

It is a happy number.

213434451 is a `hidden beast` number, since 213 + 4 + 3 + 445 + 1 = 666.

It is not a de Polignac number, because 213434451 - 2⁷ = 213434323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213434401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41316 + ... + 46193.

It is an arithmetic number, because the mean of its divisors is an integer number (25786280).

Almost surely, 2^213434451 is an apocalyptic number.

213434451 is a deficient number, since it is larger than the sum of its proper divisors (96000909).

213434451 is a wasteful number, since it uses less digits than its factorization.

213434451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87786 (or 87783 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 213434451 is about 14609.3959834074. The cubic root of 213434451 is about 597.6150240439.

Adding to 213434451 its reverse (154434312), we get a palindrome (367868763).

It can be divided in two parts, 2134 and 34451, that added together give a triangular number (36585 = T₂₇₀).

The spelling of 213434451 in words is "two hundred thirteen million, four hundred thirty-four thousand, four hundred fifty-one".