1355511541 has 4 divisors (see below), whose sum is σ = 1435247532. Its totient is φ = 1275775552.

The previous prime is 1355511499. The next prime is 1355511551. The reversal of 1355511541 is 1451155531.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1164242641 + 191268900 = 34121^2 + 13830^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355511541 - 2⁷ = 1355511413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355511551) 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, 39867970 + ... + 39868003.

It is an arithmetic number, because the mean of its divisors is an integer number (358811883).

Almost surely, 2^1355511541 is an apocalyptic number.

It is an amenable number.

1355511541 is a deficient number, since it is larger than the sum of its proper divisors (79735991).

1355511541 is an equidigital number, since it uses as much as digits as its factorization.

1355511541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79735990.

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

The square root of 1355511541 is about 36817.2723188451. The cubic root of 1355511541 is about 1106.7114585566.

The spelling of 1355511541 in words is "one billion, three hundred fifty-five million, five hundred eleven thousand, five hundred forty-one".