1115220151 has 4 divisors (see below), whose sum is σ = 1122705000. Its totient is φ = 1107735304.

The previous prime is 1115220109. The next prime is 1115220157. The reversal of 1115220151 is 1510225111.

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

It is a cyclic number.

It is not a de Polignac number, because 1115220151 - 2¹³ = 1115211959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115220157) 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, 3742201 + ... + 3742498.

It is an arithmetic number, because the mean of its divisors is an integer number (280676250).

Almost surely, 2^1115220151 is an apocalyptic number.

1115220151 is a deficient number, since it is larger than the sum of its proper divisors (7484849).

1115220151 is an equidigital number, since it uses as much as digits as its factorization.

1115220151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7484848.

The product of its (nonzero) digits is 100, while the sum is 19.

The square root of 1115220151 is about 33394.9120525867. The cubic root of 1115220151 is about 1037.0193722132.

Adding to 1115220151 its reverse (1510225111), we get a palindrome (2625445262).

The spelling of 1115220151 in words is "one billion, one hundred fifteen million, two hundred twenty thousand, one hundred fifty-one".