2142155297 has 4 divisors (see below), whose sum is σ = 2143556016. Its totient is φ = 2140754580.

The previous prime is 2142155221. The next prime is 2142155317. The reversal of 2142155297 is 7925512412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2142155297 - 2¹⁴ = 2142138913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2142155297.

It is not an unprimeable number, because it can be changed into a prime (2142155207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698063 + ... + 701124.

It is an arithmetic number, because the mean of its divisors is an integer number (535889004).

Almost surely, 2^2142155297 is an apocalyptic number.

It is an amenable number.

2142155297 is a deficient number, since it is larger than the sum of its proper divisors (1400719).

2142155297 is a wasteful number, since it uses less digits than its factorization.

2142155297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400718.

The product of its digits is 50400, while the sum is 38.

The square root of 2142155297 is about 46283.4235661106. The cubic root of 2142155297 is about 1289.0912207993.

The spelling of 2142155297 in words is "two billion, one hundred forty-two million, one hundred fifty-five thousand, two hundred ninety-seven".