136213240 has 32 divisors (see below), whose sum is σ = 307229760. Its totient is φ = 54352000.

The previous prime is 136213237. The next prime is 136213249. The reversal of 136213240 is 42312631.

136213240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136213249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13290 + ... + 21190.

It is an arithmetic number, because the mean of its divisors is an integer number (9600930).

Almost surely, 2^136213240 is an apocalyptic number.

136213240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136213240 is an abundant number, since it is smaller than the sum of its proper divisors (171016520).

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

136213240 is a wasteful number, since it uses less digits than its factorization.

136213240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8343 (or 8339 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 136213240 is about 11671.0427983107. The cubic root of 136213240 is about 514.5249523318.

Adding to 136213240 its reverse (42312631), we get a palindrome (178525871).

It can be divided in two parts, 13621 and 3240, that added together give a palindrome (16861).

The spelling of 136213240 in words is "one hundred thirty-six million, two hundred thirteen thousand, two hundred forty".