21554162 has 8 divisors (see below), whose sum is σ = 36950016. Its totient is φ = 9237492.

The previous prime is 21554161. The next prime is 21554173. The reversal of 21554162 is 26145512.

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

It is not an unprimeable number, because it can be changed into a prime (21554161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 769778 + ... + 769805.

It is an arithmetic number, because the mean of its divisors is an integer number (4618752).

Almost surely, 2^21554162 is an apocalyptic number.

21554162 is a deficient number, since it is larger than the sum of its proper divisors (15395854).

21554162 is a wasteful number, since it uses less digits than its factorization.

21554162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539592.

The product of its digits is 2400, while the sum is 26.

The square root of 21554162 is about 4642.6460127819. The cubic root of 21554162 is about 278.2981894345.

Adding to 21554162 its reverse (26145512), we get a palindrome (47699674).

The spelling of 21554162 in words is "twenty-one million, five hundred fifty-four thousand, one hundred sixty-two".