2151232 has 14 divisors (see below), whose sum is σ = 4268978. Its totient is φ = 1075584.

The previous prime is 2151221. The next prime is 2151241. The reversal of 2151232 is 2321512.

It can be written as a sum of positive squares in only one way, i.e., 1597696 + 553536 = 1264^2 + 744^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16743 + ... + 16870.

It is an arithmetic number, because the mean of its divisors is an integer number (304927).

2^2151232 is an apocalyptic number.

It is an amenable number.

2151232 is a deficient number, since it is larger than the sum of its proper divisors (2117746).

2151232 is an equidigital number, since it uses as much as digits as its factorization.

2151232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33625 (or 33615 counting only the distinct ones).

The product of its digits is 120, while the sum is 16.

The square root of 2151232 is about 1466.7078782089. The cubic root of 2151232 is about 129.0909360216.

Adding to 2151232 its reverse (2321512), we get a palindrome (4472744).

The spelling of 2151232 in words is "two million, one hundred fifty-one thousand, two hundred thirty-two".