155251101 has 4 divisors (see below), whose sum is σ = 207001472. Its totient is φ = 103500732.

The previous prime is 155251093. The next prime is 155251139. The reversal of 155251101 is 101152551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 155251101 - 2³ = 155251093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155251301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25875181 + ... + 25875186.

It is an arithmetic number, because the mean of its divisors is an integer number (51750368).

Almost surely, 2^155251101 is an apocalyptic number.

It is an amenable number.

155251101 is a deficient number, since it is larger than the sum of its proper divisors (51750371).

155251101 is an equidigital number, since it uses as much as digits as its factorization.

155251101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51750370.

The product of its (nonzero) digits is 250, while the sum is 21.

The square root of 155251101 is about 12459.9799759069. The cubic root of 155251101 is about 537.4584511601.

The spelling of 155251101 in words is "one hundred fifty-five million, two hundred fifty-one thousand, one hundred one".