2145131404 has 24 divisors (see below), whose sum is σ = 4052391728. Its totient is φ = 987698880.

The previous prime is 2145131377. The next prime is 2145131413. The reversal of 2145131404 is 4041315412.

It is a super-2 number, since 2×2145131404² = 9203177480854022432, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27102 + ... + 70885.

Almost surely, 2^2145131404 is an apocalyptic number.

It is an amenable number.

2145131404 is a deficient number, since it is larger than the sum of its proper divisors (1907260324).

2145131404 is a wasteful number, since it uses less digits than its factorization.

2145131404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98425 (or 98423 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2145131404 is about 46315.5633021990. The cubic root of 2145131404 is about 1289.6879248298.

Adding to 2145131404 its reverse (4041315412), we get a palindrome (6186446816).

The spelling of 2145131404 in words is "two billion, one hundred forty-five million, one hundred thirty-one thousand, four hundred four".