1147220051 has 4 divisors (see below), whose sum is σ = 1150025400. Its totient is φ = 1144414704.

The previous prime is 1147220021. The next prime is 1147220089. The reversal of 1147220051 is 1500227411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1500227411 = 24061 ⋅62351.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1147220051 is a prime.

It is a super-2 number, since 2×1147220051² = 2632227690832885202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1147219999 and 1147220026.

It is not an unprimeable number, because it can be changed into a prime (1147220021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1402061 + ... + 1402878.

It is an arithmetic number, because the mean of its divisors is an integer number (287506350).

Almost surely, 2^1147220051 is an apocalyptic number.

1147220051 is a deficient number, since it is larger than the sum of its proper divisors (2805349).

1147220051 is an equidigital number, since it uses as much as digits as its factorization.

1147220051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805348.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 1147220051 is about 33870.6370031625. The cubic root of 1147220051 is about 1046.8446622898.

Adding to 1147220051 its reverse (1500227411), we get a palindrome (2647447462).

The spelling of 1147220051 in words is "one billion, one hundred forty-seven million, two hundred twenty thousand, fifty-one".