5161220651 has 4 divisors (see below), whose sum is σ = 5167066632. Its totient is φ = 5155374672.

The previous prime is 5161220639. The next prime is 5161220663. The reversal of 5161220651 is 1560221615.

It is a happy number.

5161220651 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1560221615 = 5 ⋅312044323.

It is an interprime number because it is at equal distance from previous prime (5161220639) and next prime (5161220663).

It is a cyclic number.

It is not a de Polignac number, because 5161220651 - 2²⁶ = 5094111787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5161220551) 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, 2921666 + ... + 2923431.

It is an arithmetic number, because the mean of its divisors is an integer number (1291766658).

Almost surely, 2^5161220651 is an apocalyptic number.

5161220651 is a deficient number, since it is larger than the sum of its proper divisors (5845981).

5161220651 is an equidigital number, since it uses as much as digits as its factorization.

5161220651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5845980.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 5161220651 is about 71841.6359153938. The cubic root of 5161220651 is about 1728.1607694489.

The spelling of 5161220651 in words is "five billion, one hundred sixty-one million, two hundred twenty thousand, six hundred fifty-one".