155135641 has 2 divisors, whose sum is σ = 155135642. Its totient is φ = 155135640.

The previous prime is 155135599. The next prime is 155135657. The reversal of 155135641 is 146531551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124099600 + 31036041 = 11140^2 + 5571^2 .

It is a cyclic number.

It is not a de Polignac number, because 155135641 - 2¹⁵ = 155102873 is a prime.

It is not a weakly prime, because it can be changed into another prime (155135681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77567820 + 77567821.

It is an arithmetic number, because the mean of its divisors is an integer number (77567821).

Almost surely, 2^155135641 is an apocalyptic number.

It is an amenable number.

155135641 is a deficient number, since it is larger than the sum of its proper divisors (1).

155135641 is an equidigital number, since it uses as much as digits as its factorization.

155135641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 31.

The square root of 155135641 is about 12455.3458803841. The cubic root of 155135641 is about 537.3251824487.

The spelling of 155135641 in words is "one hundred fifty-five million, one hundred thirty-five thousand, six hundred forty-one".