136221465 has 32 divisors (see below), whose sum is σ = 221671296. Its totient is φ = 71424000.

The previous prime is 136221461. The next prime is 136221467. The reversal of 136221465 is 564122631.

It is not a de Polignac number, because 136221465 - 2² = 136221461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136221461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365019 + ... + 365391.

It is an arithmetic number, because the mean of its divisors is an integer number (6927228).

Almost surely, 2^136221465 is an apocalyptic number.

136221465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136221465 is a deficient number, since it is larger than the sum of its proper divisors (85449831).

136221465 is a wasteful number, since it uses less digits than its factorization.

136221465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729.

The product of its digits is 8640, while the sum is 30.

The square root of 136221465 is about 11671.3951608195. The cubic root of 136221465 is about 514.5353083553.

The spelling of 136221465 in words is "one hundred thirty-six million, two hundred twenty-one thousand, four hundred sixty-five".