2231191477 has 2 divisors, whose sum is σ = 2231191478. Its totient is φ = 2231191476.

The previous prime is 2231191447. The next prime is 2231191483. The reversal of 2231191477 is 7741911322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1810162116 + 421029361 = 42546^2 + 20519^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231191477 - 2⁷ = 2231191349 is a prime.

It is a super-3 number, since 3×2231191477³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2231191447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1115595738 + 1115595739.

It is an arithmetic number, because the mean of its divisors is an integer number (1115595739).

Almost surely, 2^2231191477 is an apocalyptic number.

It is an amenable number.

2231191477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2231191477 is an equidigital number, since it uses as much as digits as its factorization.

2231191477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 37.

The square root of 2231191477 is about 47235.4895920430. The cubic root of 2231191477 is about 1306.7091958759.

The spelling of 2231191477 in words is "two billion, two hundred thirty-one million, one hundred ninety-one thousand, four hundred seventy-seven".