13219642157 has 4 divisors (see below), whose sum is σ = 13292679036. Its totient is φ = 13146605280.

The previous prime is 13219642133. The next prime is 13219642159. The reversal of 13219642157 is 75124691231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6072461476 + 7147180681 = 77926^2 + 84541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13219642157 is a prime.

It is a super-2 number, since 2×13219642157² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13219642159) 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, 36518168 + ... + 36518529.

It is an arithmetic number, because the mean of its divisors is an integer number (3323169759).

Almost surely, 2^13219642157 is an apocalyptic number.

It is an amenable number.

13219642157 is a deficient number, since it is larger than the sum of its proper divisors (73036879).

13219642157 is an equidigital number, since it uses as much as digits as its factorization.

13219642157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73036878.

The product of its digits is 90720, while the sum is 41.

The spelling of 13219642157 in words is "thirteen billion, two hundred nineteen million, six hundred forty-two thousand, one hundred fifty-seven".