135821650 has 24 divisors (see below), whose sum is σ = 253929060. Its totient is φ = 54048960.

The previous prime is 135821641. The next prime is 135821689. The reversal of 135821650 is 56128531.

It can be written as a sum of positive squares in 6 ways, for example, as 124077321 + 11744329 = 11139^2 + 3427^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2956 + ... + 16744.

Almost surely, 2^135821650 is an apocalyptic number.

135821650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135821650 is a deficient number, since it is larger than the sum of its proper divisors (118107410).

135821650 is a wasteful number, since it uses less digits than its factorization.

135821650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13998 (or 13993 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 135821650 is about 11654.2545879177. The cubic root of 135821650 is about 514.0314217191.

The spelling of 135821650 in words is "one hundred thirty-five million, eight hundred twenty-one thousand, six hundred fifty".