1535141381 has 4 divisors (see below), whose sum is σ = 1535434572. Its totient is φ = 1534848192.

The previous prime is 1535141353. The next prime is 1535141383. The reversal of 1535141381 is 1831415351.

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 1414888225 + 120253156 = 37615^2 + 10966^2 .

It is a cyclic number.

It is not a de Polignac number, because 1535141381 - 2⁶ = 1535141317 is a prime.

It is a super-2 number, since 2×1535141381² = 4713318119317174322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1535141383) 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, 138596 + ... + 149261.

It is an arithmetic number, because the mean of its divisors is an integer number (383858643).

Almost surely, 2^1535141381 is an apocalyptic number.

It is an amenable number.

1535141381 is a deficient number, since it is larger than the sum of its proper divisors (293191).

1535141381 is an equidigital number, since it uses as much as digits as its factorization.

1535141381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293190.

The product of its digits is 7200, while the sum is 32.

The square root of 1535141381 is about 39180.8802989417. The cubic root of 1535141381 is about 1153.5846260899.

The spelling of 1535141381 in words is "one billion, five hundred thirty-five million, one hundred forty-one thousand, three hundred eighty-one".