91031313152312 has 64 divisors (see below), whose sum is σ = 186060339118080. Its totient is φ = 41501003778432.

The previous prime is 91031313152281. The next prime is 91031313152323. The reversal of 91031313152312 is 21325131313019.

It is a super-3 number, since 3×91031313152312³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48655433 + ... + 50491719.

It is an arithmetic number, because the mean of its divisors is an integer number (2907192798720).

Almost surely, 2^{91031313152312} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91031313152312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93030169559040).

91031313152312 is an abundant number, since it is smaller than the sum of its proper divisors (95029025965768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91031313152312 is a wasteful number, since it uses less digits than its factorization.

91031313152312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842132 (or 1842128 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The spelling of 91031313152312 in words is "ninety-one trillion, thirty-one billion, three hundred thirteen million, one hundred fifty-two thousand, three hundred twelve".