2151357340 has 24 divisors (see below), whose sum is σ = 4928564592. Its totient is φ = 782311680.

The previous prime is 2151357331. The next prime is 2151357347. The reversal of 2151357340 is 437531512.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151357347) 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, 4889229 + ... + 4889668.

It is an arithmetic number, because the mean of its divisors is an integer number (205356858).

Almost surely, 2^2151357340 is an apocalyptic number.

2151357340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151357340 is an abundant number, since it is smaller than the sum of its proper divisors (2777207252).

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

2151357340 is a wasteful number, since it uses less digits than its factorization.

2151357340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9778917 (or 9778915 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 2151357340 is about 46382.7267417516. The cubic root of 2151357340 is about 1290.9344310337.

Adding to 2151357340 its reverse (437531512), we get a palindrome (2588888852).

The spelling of 2151357340 in words is "two billion, one hundred fifty-one million, three hundred fifty-seven thousand, three hundred forty".