155195983 has 4 divisors (see below), whose sum is σ = 155397528. Its totient is φ = 154994440.

The previous prime is 155195981. The next prime is 155195993. The reversal of 155195983 is 389591551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389591551 = 2131 ⋅182821.

It is a cyclic number.

It is not a de Polignac number, because 155195983 - 2¹ = 155195981 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 (155195981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99613 + ... + 101158.

It is an arithmetic number, because the mean of its divisors is an integer number (38849382).

Almost surely, 2^155195983 is an apocalyptic number.

155195983 is a deficient number, since it is larger than the sum of its proper divisors (201545).

155195983 is an equidigital number, since it uses as much as digits as its factorization.

155195983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201544.

The product of its digits is 243000, while the sum is 46.

The square root of 155195983 is about 12457.7679782536. The cubic root of 155195983 is about 537.3948399283.

The spelling of 155195983 in words is "one hundred fifty-five million, one hundred ninety-five thousand, nine hundred eighty-three".