2151512444 has 6 divisors (see below), whose sum is σ = 3765146784. Its totient is φ = 1075756220.

The previous prime is 2151512423. The next prime is 2151512453. The reversal of 2151512444 is 4442151512.

It is a happy number.

2151512444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268939052 + ... + 268939059.

It is an arithmetic number, because the mean of its divisors is an integer number (627524464).

Almost surely, 2^2151512444 is an apocalyptic number.

It is an amenable number.

2151512444 is a deficient number, since it is larger than the sum of its proper divisors (1613634340).

2151512444 is a wasteful number, since it uses less digits than its factorization.

2151512444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537878115 (or 537878113 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 2151512444 is about 46384.3987133605. The cubic root of 2151512444 is about 1290.9654539727.

Adding to 2151512444 its reverse (4442151512), we get a palindrome (6593663956).

The spelling of 2151512444 in words is "two billion, one hundred fifty-one million, five hundred twelve thousand, four hundred forty-four".