825388431 has 8 divisors (see below), whose sum is σ = 1257734784. Its totient is φ = 471650520.

The previous prime is 825388429. The next prime is 825388453. The reversal of 825388431 is 134883528.

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

It is not a de Polignac number, because 825388431 - 2¹ = 825388429 is a prime.

It is a super-2 number, since 2×825388431² = 1362532124057283522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (825388631) 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, 19652085 + ... + 19652126.

It is an arithmetic number, because the mean of its divisors is an integer number (157216848).

Almost surely, 2^825388431 is an apocalyptic number.

825388431 is a deficient number, since it is larger than the sum of its proper divisors (432346353).

825388431 is a wasteful number, since it uses less digits than its factorization.

825388431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39304221.

The product of its digits is 184320, while the sum is 42.

The square root of 825388431 is about 28729.5741527785. The cubic root of 825388431 is about 938.0358985508.

The spelling of 825388431 in words is "eight hundred twenty-five million, three hundred eighty-eight thousand, four hundred thirty-one".