2157512052 has 12 divisors (see below), whose sum is σ = 5034194816. Its totient is φ = 719170680.

The previous prime is 2157512039. The next prime is 2157512083. The reversal of 2157512052 is 2502157512.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 89896324 + ... + 89896347.

Almost surely, 2^2157512052 is an apocalyptic number.

It is an amenable number.

2157512052 is an abundant number, since it is smaller than the sum of its proper divisors (2876682764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2157512052 is a wasteful number, since it uses less digits than its factorization.

2157512052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179792678 (or 179792676 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 2157512052 is about 46449.0263837683. The cubic root of 2157512052 is about 1292.1643157992.

Adding to 2157512052 its reverse (2502157512), we get a palindrome (4659669564).

The spelling of 2157512052 in words is "two billion, one hundred fifty-seven million, five hundred twelve thousand, fifty-two".