1542123005231 has 2 divisors, whose sum is σ = 1542123005232. Its totient is φ = 1542123005230.

The previous prime is 1542123005191. The next prime is 1542123005239. The reversal of 1542123005231 is 1325003212451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1542123005231 - 2¹⁸ = 1542122743087 is a prime.

It is a super-2 number, since 2×1542123005231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1542123005194 and 1542123005203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1542123005239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 771061502615 + 771061502616.

It is an arithmetic number, because the mean of its divisors is an integer number (771061502616).

Almost surely, 2^{1542123005231} is an apocalyptic number.

1542123005231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1542123005231 is an equidigital number, since it uses as much as digits as its factorization.

1542123005231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 1542123005231 its reverse (1325003212451), we get a palindrome (2867126217682).

The spelling of 1542123005231 in words is "one trillion, five hundred forty-two billion, one hundred twenty-three million, five thousand, two hundred thirty-one".