2156142467 has 4 divisors (see below), whose sum is σ = 2156246040. Its totient is φ = 2156038896.

The previous prime is 2156142463. The next prime is 2156142503. The reversal of 2156142467 is 7642416512.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2156142467 - 2² = 2156142463 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 2156142467.

It is not an unprimeable number, because it can be changed into a prime (2156142463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8498 + ... + 66215.

It is an arithmetic number, because the mean of its divisors is an integer number (539061510).

Almost surely, 2^2156142467 is an apocalyptic number.

2156142467 is a deficient number, since it is larger than the sum of its proper divisors (103573).

2156142467 is an equidigital number, since it uses as much as digits as its factorization.

2156142467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103572.

The product of its digits is 80640, while the sum is 38.

The square root of 2156142467 is about 46434.2811616590. The cubic root of 2156142467 is about 1291.8908366826.

Adding to 2156142467 its reverse (7642416512), we get a palindrome (9798558979).

The spelling of 2156142467 in words is "two billion, one hundred fifty-six million, one hundred forty-two thousand, four hundred sixty-seven".