155451229 has 2 divisors, whose sum is σ = 155451230. Its totient is φ = 155451228.

The previous prime is 155451211. The next prime is 155451269. The reversal of 155451229 is 922154551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118265625 + 37185604 = 10875^2 + 6098^2 .

It is a cyclic number.

It is not a de Polignac number, because 155451229 - 2⁹ = 155450717 is a prime.

It is a super-2 number, since 2×155451229² = 48330169195220882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155451194 and 155451203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155451209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77725614 + 77725615.

It is an arithmetic number, because the mean of its divisors is an integer number (77725615).

Almost surely, 2^155451229 is an apocalyptic number.

It is an amenable number.

155451229 is a deficient number, since it is larger than the sum of its proper divisors (1).

155451229 is an equidigital number, since it uses as much as digits as its factorization.

155451229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 34.

The square root of 155451229 is about 12468.0082210432. The cubic root of 155451229 is about 537.6892907483.

The spelling of 155451229 in words is "one hundred fifty-five million, four hundred fifty-one thousand, two hundred twenty-nine".