2145031546 has 24 divisors (see below), whose sum is σ = 3863604096. Its totient is φ = 889643160.

The previous prime is 2145031523. The next prime is 2145031561. The reversal of 2145031546 is 6451305412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349996 + ... + 356071.

It is an arithmetic number, because the mean of its divisors is an integer number (160983504).

Almost surely, 2^2145031546 is an apocalyptic number.

2145031546 is a deficient number, since it is larger than the sum of its proper divisors (1718572550).

2145031546 is a wasteful number, since it uses less digits than its factorization.

2145031546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706114 (or 706107 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2145031546 is about 46314.4852718888. The cubic root of 2145031546 is about 1289.6679124341.

Adding to 2145031546 its reverse (6451305412), we get a palindrome (8596336958).

The spelling of 2145031546 in words is "two billion, one hundred forty-five million, thirty-one thousand, five hundred forty-six".