2151233245240 has 16 divisors (see below), whose sum is σ = 4840274801880. Its totient is φ = 860493298080.

The previous prime is 2151233245229. The next prime is 2151233245243. The reversal of 2151233245240 is 425423321512.

It is a junction number, because it is equal to n+sod(n) for n = 2151233245196 and 2151233245205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151233245243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26890415526 + ... + 26890415605.

Almost surely, 2^{2151233245240} is an apocalyptic number.

2151233245240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151233245240 is an abundant number, since it is smaller than the sum of its proper divisors (2689041556640).

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

2151233245240 is a wasteful number, since it uses less digits than its factorization.

2151233245240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53780831142 (or 53780831138 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 2151233245240 its reverse (425423321512), we get a palindrome (2576656566752).

The spelling of 2151233245240 in words is "two trillion, one hundred fifty-one billion, two hundred thirty-three million, two hundred forty-five thousand, two hundred forty".