13521374251 has 32 divisors (see below), whose sum is σ = 17603785728. Its totient is φ = 10070586240.

The previous prime is 13521374233. The next prime is 13521374281. The reversal of 13521374251 is 15247312531.

It is not a de Polignac number, because 13521374251 - 2⁹ = 13521373739 is a prime.

It is a super-2 number, since 2×13521374251² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13521374221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3960021 + ... + 3963433.

It is an arithmetic number, because the mean of its divisors is an integer number (550118304).

Almost surely, 2^13521374251 is an apocalyptic number.

13521374251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13521374251 is a deficient number, since it is larger than the sum of its proper divisors (4082411477).

13521374251 is a wasteful number, since it uses less digits than its factorization.

13521374251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691.

The product of its digits is 25200, while the sum is 34.

Adding to 13521374251 its reverse (15247312531), we get a palindrome (28768686782).

The spelling of 13521374251 in words is "thirteen billion, five hundred twenty-one million, three hundred seventy-four thousand, two hundred fifty-one".