155061047 has 2 divisors, whose sum is σ = 155061048. Its totient is φ = 155061046.

The previous prime is 155061017. The next prime is 155061073. The reversal of 155061047 is 740160551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155061047 - 2²² = 150866743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155061007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77530523 + 77530524.

It is an arithmetic number, because the mean of its divisors is an integer number (77530524).

Almost surely, 2^155061047 is an apocalyptic number.

155061047 is a deficient number, since it is larger than the sum of its proper divisors (1).

155061047 is an equidigital number, since it uses as much as digits as its factorization.

155061047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 155061047 is about 12452.3510631527. The cubic root of 155061047 is about 537.2390478029.

The spelling of 155061047 in words is "one hundred fifty-five million, sixty-one thousand, forty-seven".