215242448 has 20 divisors (see below), whose sum is σ = 419448228. Its totient is φ = 106997760.

The previous prime is 215242439. The next prime is 215242453. The reversal of 215242448 is 844242512.

It can be written as a sum of positive squares in 2 ways, for example, as 134745664 + 80496784 = 11608^2 + 8972^2 .

It is a super-2 number, since 2×215242448² = 92658622842065408, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 36113 + ... + 41648.

Almost surely, 2^215242448 is an apocalyptic number.

It is an amenable number.

215242448 is a deficient number, since it is larger than the sum of its proper divisors (204205780).

215242448 is a wasteful number, since it uses less digits than its factorization.

215242448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77942 (or 77936 counting only the distinct ones).

The product of its digits is 20480, while the sum is 32.

The square root of 215242448 is about 14671.1433773922. The cubic root of 215242448 is about 599.2977413383.

The spelling of 215242448 in words is "two hundred fifteen million, two hundred forty-two thousand, four hundred forty-eight".