2151432 has 24 divisors (see below), whose sum is σ = 5826990. Its totient is φ = 717120.

The previous prime is 2151421. The next prime is 2151433. The reversal of 2151432 is 2341512.

It can be written as a sum of positive squares in only one way, i.e., 2090916 + 60516 = 1446^2 + 246^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (2151433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14869 + ... + 15012.

2^2151432 is an apocalyptic number.

It is an amenable number.

2151432 is an abundant number, since it is smaller than the sum of its proper divisors (3675558).

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

2151432 is a wasteful number, since it uses less digits than its factorization.

2151432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29893 (or 29886 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 2151432 is about 1466.7760565267. The cubic root of 2151432 is about 129.0949364249.

Adding to 2151432 its reverse (2341512), we get a palindrome (4492944).

The spelling of 2151432 in words is "two million, one hundred fifty-one thousand, four hundred thirty-two".