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21122402 = 271508743
BaseRepresentation
bin101000010010…
…0110101100010
31110202010111012
41100210311202
520401404102
62032420522
7344352230
oct120446542
943663435
1021122402
1110a17634
1270a7742
1344b7282
142b3b950
151cc3752
hex1424d62

21122402 has 8 divisors (see below), whose sum is σ = 36209856. Its totient is φ = 9052452.

The previous prime is 21122399. The next prime is 21122419. The reversal of 21122402 is 20422112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 1508743 = 21122402 / (2 + 1 + 1 + 2 + 2 + 4 + 0 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754358 + ... + 754385.

It is an arithmetic number, because the mean of its divisors is an integer number (4526232).

Almost surely, 221122402 is an apocalyptic number.

21122402 is a deficient number, since it is larger than the sum of its proper divisors (15087454).

21122402 is a wasteful number, since it uses less digits than its factorization.

21122402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508752.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 21122402 is about 4595.9114438814. The cubic root of 21122402 is about 276.4274078667.

Adding to 21122402 its reverse (20422112), we get a palindrome (41544514).

The spelling of 21122402 in words is "twenty-one million, one hundred twenty-two thousand, four hundred two".

Divisors: 1 2 7 14 1508743 3017486 10561201 21122402