471921557 has 2 divisors, whose sum is σ = 471921558. Its totient is φ = 471921556.

The previous prime is 471921539. The next prime is 471921607. The reversal of 471921557 is 755129174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 471801841 + 119716 = 21721^2 + 346^2 .

It is a cyclic number.

It is not a de Polignac number, because 471921557 - 2⁸ = 471921301 is a prime.

It is a super-2 number, since 2×471921557² = 445419911922608498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (471921157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235960778 + 235960779.

It is an arithmetic number, because the mean of its divisors is an integer number (235960779).

Almost surely, 2^471921557 is an apocalyptic number.

It is an amenable number.

471921557 is a deficient number, since it is larger than the sum of its proper divisors (1).

471921557 is an equidigital number, since it uses as much as digits as its factorization.

471921557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 41.

The square root of 471921557 is about 21723.7555915178. The cubic root of 471921557 is about 778.5561482542.

The spelling of 471921557 in words is "four hundred seventy-one million, nine hundred twenty-one thousand, five hundred fifty-seven".