215142460 has 48 divisors (see below), whose sum is σ = 507721536. Its totient is φ = 75981312.

The previous prime is 215142451. The next prime is 215142481. The reversal of 215142460 is 64241512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 12009 + ... + 23968.

It is an arithmetic number, because the mean of its divisors is an integer number (10577532).

Almost surely, 2^215142460 is an apocalyptic number.

215142460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215142460 is an abundant number, since it is smaller than the sum of its proper divisors (292579076).

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

215142460 is a wasteful number, since it uses less digits than its factorization.

215142460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36022 (or 36020 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 215142460 is about 14667.7353398539. The cubic root of 215142460 is about 599.2049283821.

Adding to 215142460 its reverse (64241512), we get a palindrome (279383972).

The spelling of 215142460 in words is "two hundred fifteen million, one hundred forty-two thousand, four hundred sixty".