25212819 has 8 divisors (see below), whose sum is σ = 35594640. Its totient is φ = 15819776.

The previous prime is 25212809. The next prime is 25212823. The reversal of 25212819 is 91821252.

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

It is a cyclic number.

It is not a de Polignac number, because 25212819 - 2⁹ = 25212307 is a prime.

It is a super-2 number, since 2×25212819² = 1271372483853522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25212809) 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, 247134 + ... + 247235.

It is an arithmetic number, because the mean of its divisors is an integer number (4449330).

Almost surely, 2^25212819 is an apocalyptic number.

25212819 is a deficient number, since it is larger than the sum of its proper divisors (10381821).

25212819 is a wasteful number, since it uses less digits than its factorization.

25212819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494389.

The product of its digits is 2880, while the sum is 30.

The square root of 25212819 is about 5021.2367998333. The cubic root of 25212819 is about 293.2291458785.

The spelling of 25212819 in words is "twenty-five million, two hundred twelve thousand, eight hundred nineteen".