155274773 has 2 divisors, whose sum is σ = 155274774. Its totient is φ = 155274772.

The previous prime is 155274761. The next prime is 155274781. The reversal of 155274773 is 377472551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138815524 + 16459249 = 11782^2 + 4057^2 .

It is a cyclic number.

It is not a de Polignac number, because 155274773 - 2⁶ = 155274709 is a prime.

It is a super-2 number, since 2×155274773² = 48220510260403058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155274773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155274703) 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, 77637386 + 77637387.

It is an arithmetic number, because the mean of its divisors is an integer number (77637387).

Almost surely, 2^155274773 is an apocalyptic number.

It is an amenable number.

155274773 is a deficient number, since it is larger than the sum of its proper divisors (1).

155274773 is an equidigital number, since it uses as much as digits as its factorization.

155274773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 205800, while the sum is 41.

The square root of 155274773 is about 12460.9298609694. The cubic root of 155274773 is about 537.4857661996.

The spelling of 155274773 in words is "one hundred fifty-five million, two hundred seventy-four thousand, seven hundred seventy-three".