20150224 has 10 divisors (see below), whose sum is σ = 39041090. Its totient is φ = 10075104.

The previous prime is 20150197. The next prime is 20150227. The reversal of 20150224 is 42205102.

It can be written as a sum of positive squares in only one way, i.e., 19009600 + 1140624 = 4360^2 + 1068^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 1259389 = 20150224 / (2 + 0 + 1 + 5 + 0 + 2 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 20150198 and 20150207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20150227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629679 + ... + 629710.

It is an arithmetic number, because the mean of its divisors is an integer number (3904109).

Almost surely, 2^20150224 is an apocalyptic number.

It is an amenable number.

20150224 is a deficient number, since it is larger than the sum of its proper divisors (18890866).

20150224 is a wasteful number, since it uses less digits than its factorization.

20150224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259397 (or 1259391 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20150224 is about 4488.9000879948. The cubic root of 20150224 is about 272.1196849297.

Adding to 20150224 its reverse (42205102), we get a palindrome (62355326).

The spelling of 20150224 in words is "twenty million, one hundred fifty thousand, two hundred twenty-four".