823915253 has 12 divisors (see below), whose sum is σ = 970568640. Its totient is φ = 697270392.

The previous prime is 823915249. The next prime is 823915273. The reversal of 823915253 is 352519328.

It is not a de Polignac number, because 823915253 - 2² = 823915249 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 (823915273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102551 + ... + 110292.

It is an arithmetic number, because the mean of its divisors is an integer number (80880720).

Almost surely, 2^823915253 is an apocalyptic number.

It is an amenable number.

823915253 is a deficient number, since it is larger than the sum of its proper divisors (146653387).

823915253 is a wasteful number, since it uses less digits than its factorization.

823915253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212936 (or 212929 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 823915253 is about 28703.9240000387. The cubic root of 823915253 is about 937.4774880046.

The spelling of 823915253 in words is "eight hundred twenty-three million, nine hundred fifteen thousand, two hundred fifty-three".