1540031023 has 2 divisors, whose sum is σ = 1540031024. Its totient is φ = 1540031022.

The previous prime is 1540031021. The next prime is 1540031089. The reversal of 1540031023 is 3201300451.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1540031023 - 2¹ = 1540031021 is a prime.

Together with 1540031021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540031021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770015511 + 770015512.

It is an arithmetic number, because the mean of its divisors is an integer number (770015512).

Almost surely, 2^1540031023 is an apocalyptic number.

1540031023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540031023 is an equidigital number, since it uses as much as digits as its factorization.

1540031023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1540031023 is about 39243.2290083270. The cubic root of 1540031023 is about 1154.8081046488.

Adding to 1540031023 its reverse (3201300451), we get a palindrome (4741331474).

The spelling of 1540031023 in words is "one billion, five hundred forty million, thirty-one thousand, twenty-three".