4523151232421 has 2 divisors, whose sum is σ = 4523151232422. Its totient is φ = 4523151232420.

The previous prime is 4523151232403. The next prime is 4523151232427. The reversal of 4523151232421 is 1242321513254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4285256047396 + 237895185025 = 2070086^2 + 487745^2 .

It is a cyclic number.

It is not a de Polignac number, because 4523151232421 - 2¹⁰ = 4523151231397 is a prime.

It is a super-2 number, since 2×4523151232421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4523151232427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2261575616210 + 2261575616211.

It is an arithmetic number, because the mean of its divisors is an integer number (2261575616211).

Almost surely, 2^{4523151232421} is an apocalyptic number.

It is an amenable number.

4523151232421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4523151232421 is an equidigital number, since it uses as much as digits as its factorization.

4523151232421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 35.

Adding to 4523151232421 its reverse (1242321513254), we get a palindrome (5765472745675).

The spelling of 4523151232421 in words is "four trillion, five hundred twenty-three billion, one hundred fifty-one million, two hundred thirty-two thousand, four hundred twenty-one".