5311561 has 2 divisors, whose sum is σ = 5311562. Its totient is φ = 5311560.

The previous prime is 5311547. The next prime is 5311567. The reversal of 5311561 is 1651135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4928400 + 383161 = 2220^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 5311561 - 2¹⁷ = 5180489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5311567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2655780 + 2655781.

It is an arithmetic number, because the mean of its divisors is an integer number (2655781).

Almost surely, 2^5311561 is an apocalyptic number.

It is an amenable number.

5311561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5311561 is an equidigital number, since it uses as much as digits as its factorization.

5311561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 22.

The square root of 5311561 is about 2304.6824076215. The cubic root of 5311561 is about 174.4780201268.

Adding to 5311561 its reverse (1651135), we get a palindrome (6962696).

The spelling of 5311561 in words is "five million, three hundred eleven thousand, five hundred sixty-one".