155233978 has 16 divisors (see below), whose sum is σ = 237781440. Its totient is φ = 75990816.

The previous prime is 155233963. The next prime is 155233993. The reversal of 155233978 is 879332551.

It is an interprime number because it is at equal distance from previous prime (155233963) and next prime (155233993).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14101 + ... + 22567.

It is an arithmetic number, because the mean of its divisors is an integer number (14861340).

Almost surely, 2^155233978 is an apocalyptic number.

155233978 is a deficient number, since it is larger than the sum of its proper divisors (82547462).

155233978 is a wasteful number, since it uses less digits than its factorization.

155233978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8661.

The product of its digits is 226800, while the sum is 43.

The square root of 155233978 is about 12459.2928370755. The cubic root of 155233978 is about 537.4386912585.

The spelling of 155233978 in words is "one hundred fifty-five million, two hundred thirty-three thousand, nine hundred seventy-eight".