155542555 has 16 divisors (see below), whose sum is σ = 213614784. Its totient is φ = 106508160.

The previous prime is 155542549. The next prime is 155542591. The reversal of 155542555 is 555245551.

It is not a de Polignac number, because 155542555 - 2⁵ = 155542523 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26029 + ... + 31441.

It is an arithmetic number, because the mean of its divisors is an integer number (13350924).

Almost surely, 2^155542555 is an apocalyptic number.

155542555 is a deficient number, since it is larger than the sum of its proper divisors (58072229).

155542555 is an equidigital number, since it uses as much as digits as its factorization.

155542555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6246.

The product of its digits is 125000, while the sum is 37.

The square root of 155542555 is about 12471.6700966631. The cubic root of 155542555 is about 537.7945657798.

The spelling of 155542555 in words is "one hundred fifty-five million, five hundred forty-two thousand, five hundred fifty-five".