155511097 has 16 divisors (see below), whose sum is σ = 185992192. Its totient is φ = 127215360.

The previous prime is 155511089. The next prime is 155511127. The reversal of 155511097 is 790115551.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 155511097 - 2³ = 155511089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155511077) 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 15 ways as a sum of consecutive naturals, for example, 10933 + ... + 20749.

It is an arithmetic number, because the mean of its divisors is an integer number (11624512).

Almost surely, 2^155511097 is an apocalyptic number.

It is an amenable number.

155511097 is a deficient number, since it is larger than the sum of its proper divisors (30481095).

155511097 is an equidigital number, since it uses as much as digits as its factorization.

155511097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9928.

The product of its (nonzero) digits is 7875, while the sum is 34.

The square root of 155511097 is about 12470.4088545645. The cubic root of 155511097 is about 537.7583075735.

The spelling of 155511097 in words is "one hundred fifty-five million, five hundred eleven thousand, ninety-seven".