2142155245 has 8 divisors (see below), whose sum is σ = 2570839416. Its totient is φ = 1713555456.

The previous prime is 2142155221. The next prime is 2142155317. The reversal of 2142155245 is 5425512412.

It can be written as a sum of positive squares in 4 ways, for example, as 84897796 + 2057257449 = 9214^2 + 45357^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2142155245 - 2¹¹ = 2142153197 is a prime.

It is a Duffinian number.

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, 72589 + ... + 97741.

It is an arithmetic number, because the mean of its divisors is an integer number (321354927).

Almost surely, 2^2142155245 is an apocalyptic number.

It is an amenable number.

2142155245 is a deficient number, since it is larger than the sum of its proper divisors (428684171).

2142155245 is a wasteful number, since it uses less digits than its factorization.

2142155245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42191.

The product of its digits is 16000, while the sum is 31.

The square root of 2142155245 is about 46283.4230043544. The cubic root of 2142155245 is about 1289.0912103686.

Adding to 2142155245 its reverse (5425512412), we get a palindrome (7567667657).

The spelling of 2142155245 in words is "two billion, one hundred forty-two million, one hundred fifty-five thousand, two hundred forty-five".