2215115215490 has 32 divisors (see below), whose sum is σ = 3993662991024. Its totient is φ = 884612378880.

The previous prime is 2215115215483. The next prime is 2215115215499. The reversal of 2215115215490 is 945125115122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 730277920969 + 1484837294521 = 854563^2 + 1218539^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2215115215499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20940212 + ... + 21045728.

Almost surely, 2^{2215115215490} is an apocalyptic number.

2215115215490 is a deficient number, since it is larger than the sum of its proper divisors (1778547775534).

2215115215490 is a wasteful number, since it uses less digits than its factorization.

2215115215490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108902.

The product of its (nonzero) digits is 36000, while the sum is 38.

The spelling of 2215115215490 in words is "two trillion, two hundred fifteen billion, one hundred fifteen million, two hundred fifteen thousand, four hundred ninety".