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13352421 = 319433541
BaseRepresentation
bin110010111011…
…110111100101
3221010101002010
4302323313211
511404234141
61154104433
7221331225
oct62736745
927111063
1013352421
11759a965
12457b119
1329c6754
141ab8085
15128b416
hexcbbde5

13352421 has 16 divisors (see below), whose sum is σ = 18818240. Its totient is φ = 8398080.

The previous prime is 13352411. The next prime is 13352491. The reversal of 13352421 is 12425331.

It is not a de Polignac number, because 13352421 - 25 = 13352389 is a prime.

It is a super-2 number, since 2×133524212 = 356574293122482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13352401) 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, 24411 + ... + 24951.

It is an arithmetic number, because the mean of its divisors is an integer number (1176140).

Almost surely, 213352421 is an apocalyptic number.

It is an amenable number.

13352421 is a deficient number, since it is larger than the sum of its proper divisors (5465819).

13352421 is a wasteful number, since it uses less digits than its factorization.

13352421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996.

The product of its digits is 720, while the sum is 21.

The square root of 13352421 is about 3654.0964683489. The cubic root of 13352421 is about 237.2393210021.

Adding to 13352421 its reverse (12425331), we get a palindrome (25777752).

The spelling of 13352421 in words is "thirteen million, three hundred fifty-two thousand, four hundred twenty-one".

Divisors: 1 3 19 57 433 541 1299 1623 8227 10279 24681 30837 234253 702759 4450807 13352421