155650013 has 2 divisors, whose sum is σ = 155650014. Its totient is φ = 155650012.

The previous prime is 155649971. The next prime is 155650021. The reversal of 155650013 is 310056551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97555129 + 58094884 = 9877^2 + 7622^2 .

It is a cyclic number.

It is not a de Polignac number, because 155650013 - 2¹⁶ = 155584477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155650043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77825006 + 77825007.

It is an arithmetic number, because the mean of its divisors is an integer number (77825007).

Almost surely, 2^155650013 is an apocalyptic number.

It is an amenable number.

155650013 is a deficient number, since it is larger than the sum of its proper divisors (1).

155650013 is an equidigital number, since it uses as much as digits as its factorization.

155650013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 155650013 is about 12475.9774366580. The cubic root of 155650013 is about 537.9183840391.

The spelling of 155650013 in words is "one hundred fifty-five million, six hundred fifty thousand, thirteen".