55707131 has 2 divisors, whose sum is σ = 55707132. Its totient is φ = 55707130.

The previous prime is 55707121. The next prime is 55707133. The reversal of 55707131 is 13170755.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55707131 - 2¹⁰ = 55706107 is a prime.

It is a super-2 number, since 2×55707131² = 6206568888502322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 55707133, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3321893 and since 55707131 and 3321893 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 55707094 and 55707103.

It is not a weakly prime, because it can be changed into another prime (55707133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27853565 + 27853566.

It is an arithmetic number, because the mean of its divisors is an integer number (27853566).

Almost surely, 2^55707131 is an apocalyptic number.

55707131 is a deficient number, since it is larger than the sum of its proper divisors (1).

55707131 is an equidigital number, since it uses as much as digits as its factorization.

55707131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3675, while the sum is 29.

The square root of 55707131 is about 7463.7209888902. The cubic root of 55707131 is about 381.9181202028.

Adding to 55707131 its reverse (13170755), we get a palindrome (68877886).

The spelling of 55707131 in words is "fifty-five million, seven hundred seven thousand, one hundred thirty-one".