420133815 has 12 divisors (see below), whose sum is σ = 728232024. Its totient is φ = 224071344.

The previous prime is 420133811. The next prime is 420133829. The reversal of 420133815 is 518331024.

It is a happy number.

It is not a de Polignac number, because 420133815 - 2² = 420133811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420133811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4668109 + ... + 4668198.

It is an arithmetic number, because the mean of its divisors is an integer number (60686002).

Almost surely, 2^420133815 is an apocalyptic number.

420133815 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

420133815 is a deficient number, since it is larger than the sum of its proper divisors (308098209).

420133815 is a wasteful number, since it uses less digits than its factorization.

420133815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9336318 (or 9336315 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 420133815 is about 20497.1660236239. The cubic root of 420133815 is about 748.9667638845.

Adding to 420133815 its reverse (518331024), we get a palindrome (938464839).

The spelling of 420133815 in words is "four hundred twenty million, one hundred thirty-three thousand, eight hundred fifteen".