2215423240 has 32 divisors (see below), whose sum is σ = 4987937880. Its totient is φ = 885594112.

The previous prime is 2215423229. The next prime is 2215423241. The reversal of 2215423240 is 423245122.

It can be written as a sum of positive squares in 4 ways, for example, as 1829615076 + 385808164 = 42774^2 + 19642^2 .

It is not an unprimeable number, because it can be changed into a prime (2215423241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47352 + ... + 81688.

Almost surely, 2^2215423240 is an apocalyptic number.

2215423240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215423240 is an abundant number, since it is smaller than the sum of its proper divisors (2772514640).

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

2215423240 is a wasteful number, since it uses less digits than its factorization.

2215423240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35961 (or 35957 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 2215423240 is about 47068.2827390165. The cubic root of 2215423240 is about 1303.6236650334.

Adding to 2215423240 its reverse (423245122), we get a palindrome (2638668362).

The spelling of 2215423240 in words is "two billion, two hundred fifteen million, four hundred twenty-three thousand, two hundred forty".