351111113505 has 40 divisors (see below), whose sum is σ = 629513946600. Its totient is φ = 187225115904.

The previous prime is 351111113503. The next prime is 351111113531. The reversal of 351111113505 is 505311111153.

351111113505 is a `hidden beast` number, since 3 + 511 + 1 + 11 + 135 + 0 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 234737343009 + 116373770496 = 484497^2 + 341136^2 .

It is not a de Polignac number, because 351111113505 - 2¹ = 351111113503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (351111113503) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2227851 + ... + 2380239.

It is an arithmetic number, because the mean of its divisors is an integer number (15737848665).

Almost surely, 2^351111113505 is an apocalyptic number.

It is an amenable number.

351111113505 is a deficient number, since it is larger than the sum of its proper divisors (278402833095).

351111113505 is a wasteful number, since it uses less digits than its factorization.

351111113505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158095 (or 158086 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 27.

Adding to 351111113505 its reverse (505311111153), we get a palindrome (856422224658).

The spelling of 351111113505 in words is "three hundred fifty-one billion, one hundred eleven million, one hundred thirteen thousand, five hundred five".