215142484 has 12 divisors (see below), whose sum is σ = 376623604. Its totient is φ = 107535744.

The previous prime is 215142481. The next prime is 215142493. The reversal of 215142484 is 484241512.

It can be written as a sum of positive squares in 2 ways, for example, as 76562500 + 138579984 = 8750^2 + 11772^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215142481) 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, 8572 + ... + 22444.

Almost surely, 2^215142484 is an apocalyptic number.

It is an amenable number.

215142484 is a deficient number, since it is larger than the sum of its proper divisors (161481120).

215142484 is a wasteful number, since it uses less digits than its factorization.

215142484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17754 (or 17752 counting only the distinct ones).

The product of its digits is 10240, while the sum is 31.

The square root of 215142484 is about 14667.7361579761. The cubic root of 215142484 is about 599.2049506633.

Adding to 215142484 its reverse (484241512), we get a palindrome (699383996).

The spelling of 215142484 in words is "two hundred fifteen million, one hundred forty-two thousand, four hundred eighty-four".