155254247 has 2 divisors, whose sum is σ = 155254248. Its totient is φ = 155254246.

The previous prime is 155254219. The next prime is 155254261. The reversal of 155254247 is 742452551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155254247 - 2²⁰ = 154205671 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155254277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77627123 + 77627124.

It is an arithmetic number, because the mean of its divisors is an integer number (77627124).

Almost surely, 2^155254247 is an apocalyptic number.

155254247 is a deficient number, since it is larger than the sum of its proper divisors (1).

155254247 is an equidigital number, since it uses as much as digits as its factorization.

155254247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56000, while the sum is 35.

The square root of 155254247 is about 12460.1062194509. The cubic root of 155254247 is about 537.4620814787.

The spelling of 155254247 in words is "one hundred fifty-five million, two hundred fifty-four thousand, two hundred forty-seven".