47775031 has 2 divisors, whose sum is σ = 47775032. Its totient is φ = 47775030.

The previous prime is 47775001. The next prime is 47775043. The reversal of 47775031 is 13057774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47775031 - 2¹¹ = 47772983 is a prime.

It is a super-2 number, since 2×47775031² = 4564907174101922, which contains 22 as substring.

It is equal to p_2875426 and since 47775031 and 2875426 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47775001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23887515 + 23887516.

It is an arithmetic number, because the mean of its divisors is an integer number (23887516).

Almost surely, 2^47775031 is an apocalyptic number.

47775031 is the 4372-nd centered pentagonal number.

47775031 is a deficient number, since it is larger than the sum of its proper divisors (1).

47775031 is an equidigital number, since it uses as much as digits as its factorization.

47775031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 47775031 is about 6911.9484228400. The cubic root of 47775031 is about 362.8554572800.

The spelling of 47775031 in words is "forty-seven million, seven hundred seventy-five thousand, thirty-one".