2157247532 has 48 divisors (see below), whose sum is σ = 4165484064. Its totient is φ = 977486400.

The previous prime is 2157247531. The next prime is 2157247559. The reversal of 2157247532 is 2357427512.

It is not an unprimeable number, because it can be changed into a prime (2157247531) 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 15 ways as a sum of consecutive naturals, for example, 3263282 + ... + 3263942.

It is an arithmetic number, because the mean of its divisors is an integer number (86780918).

Almost surely, 2^2157247532 is an apocalyptic number.

2157247532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2157247532 is a deficient number, since it is larger than the sum of its proper divisors (2008236532).

2157247532 is a wasteful number, since it uses less digits than its factorization.

2157247532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311 (or 1287 counting only the distinct ones).

The product of its digits is 117600, while the sum is 38.

The square root of 2157247532 is about 46446.1788740473. The cubic root of 2157247532 is about 1292.1115053913. Note that the first 3 decimals are identical.

The spelling of 2157247532 in words is "two billion, one hundred fifty-seven million, two hundred forty-seven thousand, five hundred thirty-two".