215133460 has 24 divisors (see below), whose sum is σ = 453680640. Its totient is φ = 85691424.

The previous prime is 215133403. The next prime is 215133463. The reversal of 215133460 is 64331512.

It is a super-2 number, since 2×215133460² = 92564811223143200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215133463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17724 + ... + 27283.

It is an arithmetic number, because the mean of its divisors is an integer number (18903360).

Almost surely, 2^215133460 is an apocalyptic number.

215133460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215133460 is an abundant number, since it is smaller than the sum of its proper divisors (238547180).

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

215133460 is a wasteful number, since it uses less digits than its factorization.

215133460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45255 (or 45253 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 215133460 is about 14667.4285408179. The cubic root of 215133460 is about 599.1965728029.

Adding to 215133460 its reverse (64331512), we get a palindrome (279464972).

The spelling of 215133460 in words is "two hundred fifteen million, one hundred thirty-three thousand, four hundred sixty".