135821030 has 16 divisors (see below), whose sum is σ = 245052864. Its totient is φ = 54200640.

The previous prime is 135821017. The next prime is 135821057. The reversal of 135821030 is 30128531.

It is a junction number, because it is equal to n+sod(n) for n = 135820987 and 135821005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11447 + ... + 20066.

It is an arithmetic number, because the mean of its divisors is an integer number (15315804).

Almost surely, 2^135821030 is an apocalyptic number.

135821030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135821030 is a deficient number, since it is larger than the sum of its proper divisors (109231834).

135821030 is a wasteful number, since it uses less digits than its factorization.

135821030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31951.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 135821030 is about 11654.2279881595. The cubic root of 135821030 is about 514.0306395660.

Adding to 135821030 its reverse (30128531), we get a palindrome (165949561).

The spelling of 135821030 in words is "one hundred thirty-five million, eight hundred twenty-one thousand, thirty".