4154423621 has 2 divisors, whose sum is σ = 4154423622. Its totient is φ = 4154423620.

The previous prime is 4154423561. The next prime is 4154423627. The reversal of 4154423621 is 1263244514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3342458596 + 811965025 = 57814^2 + 28495^2 .

It is a cyclic number.

It is not a de Polignac number, because 4154423621 - 2¹⁸ = 4154161477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4154423627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2077211810 + 2077211811.

It is an arithmetic number, because the mean of its divisors is an integer number (2077211811).

Almost surely, 2^4154423621 is an apocalyptic number.

It is an amenable number.

4154423621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4154423621 is an equidigital number, since it uses as much as digits as its factorization.

4154423621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 32.

The square root of 4154423621 is about 64454.8184467228. The cubic root of 4154423621 is about 1607.5713573952.

The spelling of 4154423621 in words is "four billion, one hundred fifty-four million, four hundred twenty-three thousand, six hundred twenty-one".