43420451 has 2 divisors, whose sum is σ = 43420452. Its totient is φ = 43420450.

The previous prime is 43420439. The next prime is 43420459. The reversal of 43420451 is 15402434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43420451 - 2⁶ = 43420387 is a prime.

It is not a weakly prime, because it can be changed into another prime (43420459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21710225 + 21710226.

It is an arithmetic number, because the mean of its divisors is an integer number (21710226).

Almost surely, 2^43420451 is an apocalyptic number.

43420451 is a deficient number, since it is larger than the sum of its proper divisors (1).

43420451 is an equidigital number, since it uses as much as digits as its factorization.

43420451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 43420451 is about 6589.4196254298. The cubic root of 43420451 is about 351.4779704896.

Adding to 43420451 its reverse (15402434), we get a palindrome (58822885).

The spelling of 43420451 in words is "forty-three million, four hundred twenty thousand, four hundred fifty-one".