21038151 has 8 divisors (see below), whose sum is σ = 28088704. Its totient is φ = 14006520.

The previous prime is 21038141. The next prime is 21038153. The reversal of 21038151 is 15183012.

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

It is not a de Polignac number, because 21038151 - 2⁷ = 21038023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21038153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1891 + ... + 6756.

It is an arithmetic number, because the mean of its divisors is an integer number (3511088).

Almost surely, 2^21038151 is an apocalyptic number.

21038151 is a deficient number, since it is larger than the sum of its proper divisors (7050553).

21038151 is an equidigital number, since it uses as much as digits as its factorization.

21038151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9461.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 21038151 is about 4586.7364214657. The cubic root of 21038151 is about 276.0593891312.

The spelling of 21038151 in words is "twenty-one million, thirty-eight thousand, one hundred fifty-one".