155112979 has 12 divisors (see below), whose sum is σ = 189935400. Its totient is φ = 125955648.

The previous prime is 155112977. The next prime is 155113001. The reversal of 155112979 is 979211551.

It is not a de Polignac number, because 155112979 - 2¹ = 155112977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155112977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82374 + ... + 84235.

It is an arithmetic number, because the mean of its divisors is an integer number (15827950).

Almost surely, 2^155112979 is an apocalyptic number.

155112979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

155112979 is a deficient number, since it is larger than the sum of its proper divisors (34822421).

155112979 is a wasteful number, since it uses less digits than its factorization.

155112979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166642 (or 166635 counting only the distinct ones).

The product of its digits is 28350, while the sum is 40.

The square root of 155112979 is about 12454.4361173037. The cubic root of 155112979 is about 537.2990172679.

The spelling of 155112979 in words is "one hundred fifty-five million, one hundred twelve thousand, nine hundred seventy-nine".