153217640 has 16 divisors (see below), whose sum is σ = 344739780. Its totient is φ = 61287040.

The previous prime is 153217639. The next prime is 153217661. The reversal of 153217640 is 46712351.

It can be written as a sum of positive squares in 2 ways, for example, as 151240804 + 1976836 = 12298^2 + 1406^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1915181 + ... + 1915260.

Almost surely, 2^153217640 is an apocalyptic number.

153217640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153217640 is an abundant number, since it is smaller than the sum of its proper divisors (191522140).

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

153217640 is a wasteful number, since it uses less digits than its factorization.

153217640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830452 (or 3830448 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 153217640 is about 12378.1113260465. Note that the first 3 decimals coincide. The cubic root of 153217640 is about 535.1016082087.

Adding to 153217640 its reverse (46712351), we get a palindrome (199929991).

The spelling of 153217640 in words is "one hundred fifty-three million, two hundred seventeen thousand, six hundred forty".