135820052 has 36 divisors (see below), whose sum is σ = 248984820. Its totient is φ = 64817280.

The previous prime is 135820049. The next prime is 135820057. The reversal of 135820052 is 250028531.

It can be written as a sum of positive squares in 2 ways, for example, as 57214096 + 78605956 = 7564^2 + 8866^2 .

It is a super-3 number, since 3×135820052³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135820057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341918 + ... + 342314.

It is an arithmetic number, because the mean of its divisors is an integer number (6916245).

Almost surely, 2^135820052 is an apocalyptic number.

It is an amenable number.

135820052 is a deficient number, since it is larger than the sum of its proper divisors (113164768).

135820052 is a wasteful number, since it uses less digits than its factorization.

135820052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 135820052 is about 11654.1860290627. The cubic root of 135820052 is about 514.0294057778.

Adding to 135820052 its reverse (250028531), we get a palindrome (385848583).

The spelling of 135820052 in words is "one hundred thirty-five million, eight hundred twenty thousand, fifty-two".