21551098 has 8 divisors (see below), whose sum is σ = 33014592. Its totient is φ = 10546236.

The previous prime is 21551071. The next prime is 21551113. The reversal of 21551098 is 89015512.

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

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, 114540 + ... + 114727.

It is an arithmetic number, because the mean of its divisors is an integer number (4126824).

Almost surely, 2^21551098 is an apocalyptic number.

21551098 is a deficient number, since it is larger than the sum of its proper divisors (11463494).

21551098 is a wasteful number, since it uses less digits than its factorization.

21551098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229316.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 21551098 is about 4642.3160168175. The cubic root of 21551098 is about 278.2850017871.

The spelling of 21551098 in words is "twenty-one million, five hundred fifty-one thousand, ninety-eight".