303212540 has 12 divisors (see below), whose sum is σ = 636746376. Its totient is φ = 121285008.

The previous prime is 303212509. The next prime is 303212543. The reversal of 303212540 is 45212303.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 15160627 = 303212540 / (3 + 0 + 3 + 2 + 1 + 2 + 5 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303212543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7580294 + ... + 7580333.

It is an arithmetic number, because the mean of its divisors is an integer number (53062198).

Almost surely, 2^303212540 is an apocalyptic number.

It is an amenable number.

303212540 is an abundant number, since it is smaller than the sum of its proper divisors (333533836).

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

303212540 is a wasteful number, since it uses less digits than its factorization.

303212540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15160636 (or 15160634 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 303212540 is about 17412.9991672888. Note that the first 3 decimals coincide. The cubic root of 303212540 is about 671.8140045295.

Adding to 303212540 its reverse (45212303), we get a palindrome (348424843).

The spelling of 303212540 in words is "three hundred three million, two hundred twelve thousand, five hundred forty".