22451641 has 4 divisors (see below), whose sum is σ = 22999284. Its totient is φ = 21904000.

The previous prime is 22451617. The next prime is 22451669. The reversal of 22451641 is 14615422.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13660416 + 8791225 = 3696^2 + 2965^2 .

It is a cyclic number.

It is not a de Polignac number, because 22451641 - 2⁵ = 22451609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22451041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273760 + ... + 273841.

It is an arithmetic number, because the mean of its divisors is an integer number (5749821).

Almost surely, 2^22451641 is an apocalyptic number.

It is an amenable number.

22451641 is a deficient number, since it is larger than the sum of its proper divisors (547643).

22451641 is an equidigital number, since it uses as much as digits as its factorization.

22451641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547642.

The product of its digits is 1920, while the sum is 25.

The square root of 22451641 is about 4738.3162621336. The cubic root of 22451641 is about 282.1084077609.

It can be divided in two parts, 224516 and 41, that multiplied together give a square (9205156 = 3034²).

The spelling of 22451641 in words is "twenty-two million, four hundred fifty-one thousand, six hundred forty-one".