2148957731 has 4 divisors (see below), whose sum is σ = 2174848872. Its totient is φ = 2123066592.

The previous prime is 2148957697. The next prime is 2148957749. The reversal of 2148957731 is 1377598412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2148957731 - 2¹⁸ = 2148695587 is a prime.

It is a super-2 number, since 2×2148957731² = 9236038659249336722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2148957761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12945446 + ... + 12945611.

It is an arithmetic number, because the mean of its divisors is an integer number (543712218).

Almost surely, 2^2148957731 is an apocalyptic number.

2148957731 is a deficient number, since it is larger than the sum of its proper divisors (25891141).

2148957731 is an equidigital number, since it uses as much as digits as its factorization.

2148957731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25891140.

The product of its digits is 423360, while the sum is 47.

The square root of 2148957731 is about 46356.8520393695. The cubic root of 2148957731 is about 1290.4542860469.

The spelling of 2148957731 in words is "two billion, one hundred forty-eight million, nine hundred fifty-seven thousand, seven hundred thirty-one".