1540311423 has 24 divisors (see below), whose sum is σ = 2471442480. Its totient is φ = 849824640.

The previous prime is 1540311389. The next prime is 1540311431. The reversal of 1540311423 is 3241130451.

It is a happy number.

It is not a de Polignac number, because 1540311423 - 2¹⁰ = 1540310399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1540311393 and 1540311402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540311463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176398 + ... + 184923.

It is an arithmetic number, because the mean of its divisors is an integer number (102976770).

Almost surely, 2^1540311423 is an apocalyptic number.

1540311423 is a deficient number, since it is larger than the sum of its proper divisors (931131057).

1540311423 is a wasteful number, since it uses less digits than its factorization.

1540311423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361367 (or 361360 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1540311423 is about 39246.8014365502. The cubic root of 1540311423 is about 1154.8781873371.

Adding to 1540311423 its reverse (3241130451), we get a palindrome (4781441874).

The spelling of 1540311423 in words is "one billion, five hundred forty million, three hundred eleven thousand, four hundred twenty-three".