211426451 has 4 divisors (see below), whose sum is σ = 211483272. Its totient is φ = 211369632.

The previous prime is 211426429. The next prime is 211426499. The reversal of 211426451 is 154624112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211426451 - 2²² = 207232147 is a prime.

It is a super-2 number, since 2×211426451² = 89402288364910802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211426451.

It is not an unprimeable number, because it can be changed into a prime (211426421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22406 + ... + 30411.

It is an arithmetic number, because the mean of its divisors is an integer number (52870818).

Almost surely, 2^211426451 is an apocalyptic number.

211426451 is a deficient number, since it is larger than the sum of its proper divisors (56821).

211426451 is an equidigital number, since it uses as much as digits as its factorization.

211426451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56820.

The product of its digits is 1920, while the sum is 26.

The square root of 211426451 is about 14540.5106856671. The cubic root of 211426451 is about 595.7349870164.

The spelling of 211426451 in words is "two hundred eleven million, four hundred twenty-six thousand, four hundred fifty-one".