1542135511 has 4 divisors (see below), whose sum is σ = 1762440592. Its totient is φ = 1321830432.

The previous prime is 1542135493. The next prime is 1542135559. The reversal of 1542135511 is 1155312451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1155312451 = 12637 ⋅91423.

It is a cyclic number.

It is not a de Polignac number, because 1542135511 - 2⁷ = 1542135383 is a prime.

It is a super-2 number, since 2×1542135511² = 4756363868574462242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1542135511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542135611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110152530 + ... + 110152543.

It is an arithmetic number, because the mean of its divisors is an integer number (440610148).

Almost surely, 2^1542135511 is an apocalyptic number.

1542135511 is a deficient number, since it is larger than the sum of its proper divisors (220305081).

1542135511 is an equidigital number, since it uses as much as digits as its factorization.

1542135511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220305080.

The product of its digits is 3000, while the sum is 28.

The square root of 1542135511 is about 39270.0332441927. The cubic root of 1542135511 is about 1155.3338892144. Note that the first 3 decimals are identical.

Adding to 1542135511 its reverse (1155312451), we get a palindrome (2697447962).

It can be divided in two parts, 1542135 and 511, that added together give a triangular number (1542646 = T₁₇₅₆).

The spelling of 1542135511 in words is "one billion, five hundred forty-two million, one hundred thirty-five thousand, five hundred eleven".