2141550391 has 2 divisors, whose sum is σ = 2141550392. Its totient is φ = 2141550390.

The previous prime is 2141550379. The next prime is 2141550409. The reversal of 2141550391 is 1930551412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2141550391 - 2¹⁹ = 2141026103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2141550331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070775195 + 1070775196.

It is an arithmetic number, because the mean of its divisors is an integer number (1070775196).

Almost surely, 2^2141550391 is an apocalyptic number.

2141550391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2141550391 is an equidigital number, since it uses as much as digits as its factorization.

2141550391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 2141550391 is about 46276.8883029099. Note that the first 3 decimals coincide. The cubic root of 2141550391 is about 1288.9698706767.

The spelling of 2141550391 in words is "two billion, one hundred forty-one million, five hundred fifty thousand, three hundred ninety-one".