2142155207 has 2 divisors, whose sum is σ = 2142155208. Its totient is φ = 2142155206.

The previous prime is 2142155179. The next prime is 2142155221. The reversal of 2142155207 is 7025512412.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142155207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2142155207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142157207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071077603 + 1071077604.

It is an arithmetic number, because the mean of its divisors is an integer number (1071077604).

Almost surely, 2^2142155207 is an apocalyptic number.

2142155207 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142155207 is an equidigital number, since it uses as much as digits as its factorization.

2142155207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 2142155207 is about 46283.4225938402. The cubic root of 2142155207 is about 1289.0912027461.

Adding to 2142155207 its reverse (7025512412), we get a palindrome (9167667619).

The spelling of 2142155207 in words is "two billion, one hundred forty-two million, one hundred fifty-five thousand, two hundred seven".