813248951 has 4 divisors (see below), whose sum is σ = 813777552. Its totient is φ = 812720352.

The previous prime is 813248923. The next prime is 813248959. The reversal of 813248951 is 159842318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813248951 is a prime.

It is a super-2 number, since 2×813248951² = 1322747712605200802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 813248899 and 813248908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813248959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261986 + ... + 265071.

It is an arithmetic number, because the mean of its divisors is an integer number (203444388).

Almost surely, 2^813248951 is an apocalyptic number.

813248951 is a deficient number, since it is larger than the sum of its proper divisors (528601).

813248951 is a wasteful number, since it uses less digits than its factorization.

813248951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528600.

The product of its digits is 69120, while the sum is 41.

The square root of 813248951 is about 28517.5200710020. The cubic root of 813248951 is about 933.4144158158.

The spelling of 813248951 in words is "eight hundred thirteen million, two hundred forty-eight thousand, nine hundred fifty-one".