155522131 has 2 divisors, whose sum is σ = 155522132. Its totient is φ = 155522130.

The previous prime is 155522119. The next prime is 155522149. The reversal of 155522131 is 131225551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155522131 - 2¹⁵ = 155489363 is a prime.

It is a super-2 number, since 2×155522131² = 48374266461562322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155522096 and 155522105.

It is not a weakly prime, because it can be changed into another prime (155522111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77761065 + 77761066.

It is an arithmetic number, because the mean of its divisors is an integer number (77761066).

Almost surely, 2^155522131 is an apocalyptic number.

155522131 is a deficient number, since it is larger than the sum of its proper divisors (1).

155522131 is an equidigital number, since it uses as much as digits as its factorization.

155522131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1500, while the sum is 25.

The square root of 155522131 is about 12470.8512540243. The cubic root of 155522131 is about 537.7710258188.

Adding to 155522131 its reverse (131225551), we get a palindrome (286747682).

The spelling of 155522131 in words is "one hundred fifty-five million, five hundred twenty-two thousand, one hundred thirty-one".