136451220 has 48 divisors (see below), whose sum is σ = 384652800. Its totient is φ = 36140416.

The previous prime is 136451219. The next prime is 136451251. The reversal of 136451220 is 22154631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1309 + ... + 16571.

It is an arithmetic number, because the mean of its divisors is an integer number (8013600).

Almost surely, 2^136451220 is an apocalyptic number.

136451220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136451220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192326400).

136451220 is an abundant number, since it is smaller than the sum of its proper divisors (248201580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136451220 is a wasteful number, since it uses less digits than its factorization.

136451220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15424 (or 15422 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 136451220 is about 11681.2336677253. The cubic root of 136451220 is about 514.8244225054.

The spelling of 136451220 in words is "one hundred thirty-six million, four hundred fifty-one thousand, two hundred twenty".