155387101 has 2 divisors, whose sum is σ = 155387102. Its totient is φ = 155387100.

The previous prime is 155387081. The next prime is 155387117. The reversal of 155387101 is 101783551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153884025 + 1503076 = 12405^2 + 1226^2 .

It is a cyclic number.

It is not a de Polignac number, because 155387101 - 2¹¹ = 155385053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155387201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77693550 + 77693551.

It is an arithmetic number, because the mean of its divisors is an integer number (77693551).

Almost surely, 2^155387101 is an apocalyptic number.

It is an amenable number.

155387101 is a deficient number, since it is larger than the sum of its proper divisors (1).

155387101 is an equidigital number, since it uses as much as digits as its factorization.

155387101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 155387101 is about 12465.4362538982. The cubic root of 155387101 is about 537.6153432652.

The spelling of 155387101 in words is "one hundred fifty-five million, three hundred eighty-seven thousand, one hundred one".