2215120356 has 18 divisors (see below), whose sum is σ = 5599332102. Its totient is φ = 738373440.

The previous prime is 2215120343. The next prime is 2215120357. The reversal of 2215120356 is 6530215122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1492585956 + 722534400 = 38634^2 + 26880^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (2215120357) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30765525 + ... + 30765596.

Almost surely, 2^2215120356 is an apocalyptic number.

It is an amenable number.

2215120356 is an abundant number, since it is smaller than the sum of its proper divisors (3384211746).

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

2215120356 is a wasteful number, since it uses less digits than its factorization.

2215120356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61531131 (or 61531126 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 2215120356 is about 47065.0651332812. The cubic root of 2215120356 is about 1303.5642535497.

Adding to 2215120356 its reverse (6530215122), we get a palindrome (8745335478).

The spelling of 2215120356 in words is "two billion, two hundred fifteen million, one hundred twenty thousand, three hundred fifty-six".