203215020 has 48 divisors (see below), whose sum is σ = 577506048. Its totient is φ = 53380800.

The previous prime is 203215009. The next prime is 203215021. The reversal of 203215020 is 20512302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (203215021) 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, 21256 + ... + 29295.

It is an arithmetic number, because the mean of its divisors is an integer number (12031376).

Almost surely, 2^203215020 is an apocalyptic number.

203215020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203215020 is an abundant number, since it is smaller than the sum of its proper divisors (374291028).

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

203215020 is a wasteful number, since it uses less digits than its factorization.

203215020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50630 (or 50628 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 203215020 is about 14255.3505744334. The cubic root of 203215020 is about 587.9204969098.

Adding to 203215020 its reverse (20512302), we get a palindrome (223727322).

The spelling of 203215020 in words is "two hundred three million, two hundred fifteen thousand, twenty".