136221753 has 16 divisors (see below), whose sum is σ = 186874880. Its totient is φ = 88200576.

The previous prime is 136221749. The next prime is 136221793. The reversal of 136221753 is 357122631.

It is not a de Polignac number, because 136221753 - 2² = 136221749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136221753.

It is not an unprimeable number, because it can be changed into a prime (136221793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120093 + ... + 121221.

It is an arithmetic number, because the mean of its divisors is an integer number (11679680).

Almost surely, 2^136221753 is an apocalyptic number.

It is an amenable number.

136221753 is a deficient number, since it is larger than the sum of its proper divisors (50653127).

136221753 is a wasteful number, since it uses less digits than its factorization.

136221753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256.

The product of its digits is 7560, while the sum is 30.

The square root of 136221753 is about 11671.4074986696. The cubic root of 136221753 is about 514.5356709660.

The spelling of 136221753 in words is "one hundred thirty-six million, two hundred twenty-one thousand, seven hundred fifty-three".