2150172 has 48 divisors (see below), whose sum is σ = 5716480. Its totient is φ = 698544.

The previous prime is 2150171. The next prime is 2150207. The reversal of 2150172 is 2710512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4413 + ... + 4875.

2^2150172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2150172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2858240).

2150172 is an abundant number, since it is smaller than the sum of its proper divisors (3566308).

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

2150172 is a wasteful number, since it uses less digits than its factorization.

2150172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2150172 is about 1466.3464802017. The cubic root of 2150172 is about 129.0697297433.

Adding to 2150172 its reverse (2710512), we get a palindrome (4860684).

It can be divided in two parts, 215017 and 2, that multiplied together give a palindrome (430034).

The spelling of 2150172 in words is "two million, one hundred fifty thousand, one hundred seventy-two".