2142154215 has 32 divisors (see below), whose sum is σ = 3819859200. Its totient is φ = 1139006880.

The previous prime is 2142154213. The next prime is 2142154247. The reversal of 2142154215 is 5124512412.

It is a happy number.

2142154215 is a `hidden beast` number, since 21 + 4 + 215 + 421 + 5 = 666.

It is not a de Polignac number, because 2142154215 - 2¹ = 2142154213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142154213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20716 + ... + 68654.

It is an arithmetic number, because the mean of its divisors is an integer number (119370600).

Almost surely, 2^2142154215 is an apocalyptic number.

2142154215 is a deficient number, since it is larger than the sum of its proper divisors (1677704985).

2142154215 is a wasteful number, since it uses less digits than its factorization.

2142154215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48284 (or 48278 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 2142154215 is about 46283.4118772590. The cubic root of 2142154215 is about 1289.0910037598.

Adding to 2142154215 its reverse (5124512412), we get a palindrome (7266666627).

The spelling of 2142154215 in words is "two billion, one hundred forty-two million, one hundred fifty-four thousand, two hundred fifteen".