13215450525454 has 4 divisors (see below), whose sum is σ = 19823175788184. Its totient is φ = 6607725262726.

The previous prime is 13215450525437. The next prime is 13215450525461. The reversal of 13215450525454 is 45452505451231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×13215450525454² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3303862631362 + ... + 3303862631365.

It is an arithmetic number, because the mean of its divisors is an integer number (4955793947046).

Almost surely, 2^{13215450525454} is an apocalyptic number.

13215450525454 is a deficient number, since it is larger than the sum of its proper divisors (6607725262730).

13215450525454 is an equidigital number, since it uses as much as digits as its factorization.

13215450525454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6607725262729.

The product of its (nonzero) digits is 2400000, while the sum is 46.

Adding to 13215450525454 its reverse (45452505451231), we get a palindrome (58667955976685).

The spelling of 13215450525454 in words is "thirteen trillion, two hundred fifteen billion, four hundred fifty million, five hundred twenty-five thousand, four hundred fifty-four".