2215644125 has 8 divisors (see below), whose sum is σ = 2765124024. Its totient is φ = 1772515200.

The previous prime is 2215644107. The next prime is 2215644139. The reversal of 2215644125 is 5214465122.

It can be written as a sum of positive squares in 4 ways, for example, as 19971961 + 2195672164 = 4469^2 + 46858^2 .

It is not a de Polignac number, because 2215644125 - 2⁸ = 2215643869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2215644091 and 2215644100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8862452 + ... + 8862701.

It is an arithmetic number, because the mean of its divisors is an integer number (345640503).

Almost surely, 2^2215644125 is an apocalyptic number.

2215644125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2215644125 is a deficient number, since it is larger than the sum of its proper divisors (549479899).

2215644125 is an equidigital number, since it uses as much as digits as its factorization.

2215644125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17725168 (or 17725158 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 2215644125 is about 47070.6291120057. The cubic root of 2215644125 is about 1303.6669887859. Note that the first 3 decimals are identical.

The spelling of 2215644125 in words is "two billion, two hundred fifteen million, six hundred forty-four thousand, one hundred twenty-five".