2142855225 has 72 divisors (see below), whose sum is σ = 4435966080. Its totient is φ = 968520960.

The previous prime is 2142855217. The next prime is 2142855233. The reversal of 2142855225 is 5225582412.

2142855225 is a `hidden beast` number, since 2 + 1 + 428 + 5 + 5 + 225 = 666.

It is an interprime number because it is at equal distance from previous prime (2142855217) and next prime (2142855233).

It is not a de Polignac number, because 2142855225 - 2³ = 2142855217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2142855225.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 132532 + ... + 147818.

It is an arithmetic number, because the mean of its divisors is an integer number (61610640).

Almost surely, 2^2142855225 is an apocalyptic number.

2142855225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2142855225 is an abundant number, since it is smaller than the sum of its proper divisors (2293110855).

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

2142855225 is a wasteful number, since it uses less digits than its factorization.

2142855225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15399 (or 15391 counting only the distinct ones).

The product of its digits is 64000, while the sum is 36.

The square root of 2142855225 is about 46290.9842733982. The cubic root of 2142855225 is about 1289.2316047683.

The spelling of 2142855225 in words is "two billion, one hundred forty-two million, eight hundred fifty-five thousand, two hundred twenty-five".