21314577 has 8 divisors (see below), whose sum is σ = 29336320. Its totient is φ = 13751280.

The previous prime is 21314569. The next prime is 21314603. The reversal of 21314577 is 77541312.

21314577 = T₂₄₃ + T₂₄₄ + ... + T₅₂₁.

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

It is not a de Polignac number, because 21314577 - 2³ = 21314569 is a prime.

It is a super-2 number, since 2×21314577² = 908622385377858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21314567) 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, 114502 + ... + 114687.

It is an arithmetic number, because the mean of its divisors is an integer number (3667040).

Almost surely, 2^21314577 is an apocalyptic number.

It is an amenable number.

21314577 is a deficient number, since it is larger than the sum of its proper divisors (8021743).

21314577 is a wasteful number, since it uses less digits than its factorization.

21314577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229223.

The product of its digits is 5880, while the sum is 30.

The square root of 21314577 is about 4616.7712743865. The cubic root of 21314577 is about 277.2632051880.

Adding to 21314577 its reverse (77541312), we get a palindrome (98855889).

The spelling of 21314577 in words is "twenty-one million, three hundred fourteen thousand, five hundred seventy-seven".