2215155400 has 24 divisors (see below), whose sum is σ = 5150236770. Its totient is φ = 886062080.

The previous prime is 2215155367. The next prime is 2215155431. The reversal of 2215155400 is 45515122.

It can be written as a sum of positive squares in 3 ways, for example, as 1468882276 + 746273124 = 38326^2 + 27318^2 .

It is a super-2 number, since 2×2215155400² = 9813826892298320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5537689 + ... + 5538088.

Almost surely, 2^2215155400 is an apocalyptic number.

2215155400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215155400 is an abundant number, since it is smaller than the sum of its proper divisors (2935081370).

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

2215155400 is a wasteful number, since it uses less digits than its factorization.

2215155400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11075793 (or 11075784 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 2215155400 is about 47065.4374249300. The cubic root of 2215155400 is about 1303.5711277984.

The spelling of 2215155400 in words is "two billion, two hundred fifteen million, one hundred fifty-five thousand, four hundred".