991052355031 has 8 divisors (see below), whose sum is σ = 1028523132000. Its totient is φ = 953801348640.

The previous prime is 991052354953. The next prime is 991052355049. The reversal of 991052355031 is 130553250199.

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

It is a cyclic number.

It is not a de Polignac number, because 991052355031 - 2¹³ = 991052346839 is a prime.

It is a super-2 number, since 2×991052355031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991052355071) 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, 54933456 + ... + 54951493.

It is an arithmetic number, because the mean of its divisors is an integer number (128565391500).

Almost surely, 2^991052355031 is an apocalyptic number.

991052355031 is a deficient number, since it is larger than the sum of its proper divisors (37470776969).

991052355031 is a wasteful number, since it uses less digits than its factorization.

991052355031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109885289.

The product of its (nonzero) digits is 182250, while the sum is 43.

The spelling of 991052355031 in words is "nine hundred ninety-one billion, fifty-two million, three hundred fifty-five thousand, thirty-one".