Search a number
21514025 = 5213531249
BaseRepresentation
bin101001000010…
…0011100101001
31111111000200202
41102010130221
521001422100
62045041545
7350603051
oct122043451
944430622
1021514025
1111164895
1272562b5
1345c35c0
142c00561
151d4e7d5
hex1484729

21514025 has 24 divisors (see below), whose sum is σ = 29295000. Its totient is φ = 15575040.

The previous prime is 21514019. The next prime is 21514033. The reversal of 21514025 is 52041512.

It can be written as a sum of positive squares in 12 ways, for example, as 8111104 + 13402921 = 2848^2 + 3661^2 .

It is not a de Polignac number, because 21514025 - 28 = 21513769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21513988 and 21514006.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16601 + ... + 17849.

It is an arithmetic number, because the mean of its divisors is an integer number (1220625).

Almost surely, 221514025 is an apocalyptic number.

21514025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21514025 is a deficient number, since it is larger than the sum of its proper divisors (7780975).

21514025 is a wasteful number, since it uses less digits than its factorization.

21514025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 21514025 is about 4638.3213558355. The cubic root of 21514025 is about 278.1253381303.

Adding to 21514025 its reverse (52041512), we get a palindrome (73555537).

The spelling of 21514025 in words is "twenty-one million, five hundred fourteen thousand, twenty-five".