813722145 has 16 divisors (see below), whose sum is σ = 1314598272. Its totient is φ = 429770880.

The previous prime is 813722141. The next prime is 813722149. The reversal of 813722145 is 541227318.

It is an interprime number because it is at equal distance from previous prime (813722141) and next prime (813722149).

It is not a de Polignac number, because 813722145 - 2² = 813722141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (813722141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261796 + ... + 264885.

It is an arithmetic number, because the mean of its divisors is an integer number (82162392).

Almost surely, 2^813722145 is an apocalyptic number.

It is an amenable number.

813722145 is a deficient number, since it is larger than the sum of its proper divisors (500876127).

813722145 is a wasteful number, since it uses less digits than its factorization.

813722145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526792.

The product of its digits is 13440, while the sum is 33.

The square root of 813722145 is about 28525.8154134111. The cubic root of 813722145 is about 933.5954183908.

The spelling of 813722145 in words is "eight hundred thirteen million, seven hundred twenty-two thousand, one hundred forty-five".