1351111540 has 96 divisors (see below), whose sum is σ = 3078673920. Its totient is φ = 496742400.

The previous prime is 1351111529. The next prime is 1351111561. The reversal of 1351111540 is 451111531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1338556 + ... + 1339564.

It is an arithmetic number, because the mean of its divisors is an integer number (32069520).

Almost surely, 2^1351111540 is an apocalyptic number.

1351111540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1351111540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1539336960).

1351111540 is an abundant number, since it is smaller than the sum of its proper divisors (1727562380).

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

1351111540 is a wasteful number, since it uses less digits than its factorization.

1351111540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153 (or 1151 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 1351111540 is about 36757.4691729450. The cubic root of 1351111540 is about 1105.5126958891.

Subtracting from 1351111540 its reverse (451111531), we obtain a palindrome (900000009).

The spelling of 1351111540 in words is "one billion, three hundred fifty-one million, one hundred eleven thousand, five hundred forty".