281216118157 has 4 divisors (see below), whose sum is σ = 302848127260. Its totient is φ = 259584109056.

The previous prime is 281216118119. The next prime is 281216118179. The reversal of 281216118157 is 751811612182.

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 186566980356 + 94649137801 = 431934^2 + 307651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281216118157 is a prime.

It is a super-2 number, since 2×281216118157² (a number of 24 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 (281216118857) 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, 10816004532 + ... + 10816004557.

It is an arithmetic number, because the mean of its divisors is an integer number (75712031815).

Almost surely, 2^281216118157 is an apocalyptic number.

It is an amenable number.

281216118157 is a deficient number, since it is larger than the sum of its proper divisors (21632009103).

281216118157 is a wasteful number, since it uses less digits than its factorization.

281216118157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21632009102.

The product of its digits is 53760, while the sum is 43.

The spelling of 281216118157 in words is "two hundred eighty-one billion, two hundred sixteen million, one hundred eighteen thousand, one hundred fifty-seven".