155078101 has 2 divisors, whose sum is σ = 155078102. Its totient is φ = 155078100.

The previous prime is 155078093. The next prime is 155078141. The reversal of 155078101 is 101870551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119377476 + 35700625 = 10926^2 + 5975^2 .

It is a cyclic number.

It is not a de Polignac number, because 155078101 - 2³ = 155078093 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155078101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155078141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77539050 + 77539051.

It is an arithmetic number, because the mean of its divisors is an integer number (77539051).

Almost surely, 2^155078101 is an apocalyptic number.

It is an amenable number.

155078101 is a deficient number, since it is larger than the sum of its proper divisors (1).

155078101 is an equidigital number, since it uses as much as digits as its factorization.

155078101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 28.

The square root of 155078101 is about 12453.0358146116. The cubic root of 155078101 is about 537.2587427102.

The spelling of 155078101 in words is "one hundred fifty-five million, seventy-eight thousand, one hundred one".