2351521240 has 16 divisors (see below), whose sum is σ = 5290922880. Its totient is φ = 940608480.

The previous prime is 2351521153. The next prime is 2351521247. The reversal of 2351521240 is 421251532.

It is a super-2 number, since 2×2351521240² = 11059304284342275200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2351521247) 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, 29393976 + ... + 29394055.

It is an arithmetic number, because the mean of its divisors is an integer number (330682680).

Almost surely, 2^2351521240 is an apocalyptic number.

2351521240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2351521240 is an abundant number, since it is smaller than the sum of its proper divisors (2939401640).

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

2351521240 is a wasteful number, since it uses less digits than its factorization.

2351521240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58788042 (or 58788038 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2351521240 is about 48492.4864283118. The cubic root of 2351521240 is about 1329.7897117921.

Adding to 2351521240 its reverse (421251532), we get a palindrome (2772772772).

The spelling of 2351521240 in words is "two billion, three hundred fifty-one million, five hundred twenty-one thousand, two hundred forty".