42551871953 has 2 divisors, whose sum is σ = 42551871954. Its totient is φ = 42551871952.

The previous prime is 42551871937. The next prime is 42551871959. The reversal of 42551871953 is 35917815524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31533590929 + 11018281024 = 177577^2 + 104968^2 .

It is a cyclic number.

It is not a de Polignac number, because 42551871953 - 2⁴ = 42551871937 is a prime.

It is a super-3 number, since 3×42551871953³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42551871959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21275935976 + 21275935977.

It is an arithmetic number, because the mean of its divisors is an integer number (21275935977).

Almost surely, 2^42551871953 is an apocalyptic number.

It is an amenable number.

42551871953 is a deficient number, since it is larger than the sum of its proper divisors (1).

42551871953 is an equidigital number, since it uses as much as digits as its factorization.

42551871953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512000, while the sum is 50.

The spelling of 42551871953 in words is "forty-two billion, five hundred fifty-one million, eight hundred seventy-one thousand, nine hundred fifty-three".