155247371 has 2 divisors, whose sum is σ = 155247372. Its totient is φ = 155247370.

The previous prime is 155247359. The next prime is 155247373. The reversal of 155247371 is 173742551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155247371 - 2¹⁴ = 155230987 is a prime.

Together with 155247373, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_8722664 and since 155247371 and 8722664 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (155247373) 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, 77623685 + 77623686.

It is an arithmetic number, because the mean of its divisors is an integer number (77623686).

Almost surely, 2^155247371 is an apocalyptic number.

155247371 is a deficient number, since it is larger than the sum of its proper divisors (1).

155247371 is an equidigital number, since it uses as much as digits as its factorization.

155247371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29400, while the sum is 35.

The square root of 155247371 is about 12459.8302957946. The cubic root of 155247371 is about 537.4541468727.

The spelling of 155247371 in words is "one hundred fifty-five million, two hundred forty-seven thousand, three hundred seventy-one".