1541135551 has 4 divisors (see below), whose sum is σ = 1541266272. Its totient is φ = 1541004832.

The previous prime is 1541135549. The next prime is 1541135569. The reversal of 1541135551 is 1555311451.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1541135551 - 2¹ = 1541135549 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1541135521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45706 + ... + 71911.

It is an arithmetic number, because the mean of its divisors is an integer number (385316568).

Almost surely, 2^1541135551 is an apocalyptic number.

1541135551 is a deficient number, since it is larger than the sum of its proper divisors (130721).

1541135551 is a wasteful number, since it uses less digits than its factorization.

1541135551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130720.

The product of its digits is 7500, while the sum is 31.

The square root of 1541135551 is about 39257.2993340092. The cubic root of 1541135551 is about 1155.0841192334.

The spelling of 1541135551 in words is "one billion, five hundred forty-one million, one hundred thirty-five thousand, five hundred fifty-one".