2142240691 has 2 divisors, whose sum is σ = 2142240692. Its totient is φ = 2142240690.

The previous prime is 2142240673. The next prime is 2142240713. The reversal of 2142240691 is 1960422412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2142240691 - 2²¹ = 2140143539 is a prime.

It is not a weakly prime, because it can be changed into another prime (2142240391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071120345 + 1071120346.

It is an arithmetic number, because the mean of its divisors is an integer number (1071120346).

Almost surely, 2^2142240691 is an apocalyptic number.

2142240691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142240691 is an equidigital number, since it uses as much as digits as its factorization.

2142240691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 2142240691 is about 46284.3460686224. The cubic root of 2142240691 is about 1289.1083498396.

The spelling of 2142240691 in words is "two billion, one hundred forty-two million, two hundred forty thousand, six hundred ninety-one".