155359939 has 12 divisors (see below), whose sum is σ = 180928944. Its totient is φ = 133015344.

The previous prime is 155359937. The next prime is 155359951. The reversal of 155359939 is 939953551.

It is not a de Polignac number, because 155359939 - 2¹ = 155359937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 155359892 and 155359901.

It is not an unprimeable number, because it can be changed into a prime (155359937) 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, 77757 + ... + 79729.

It is an arithmetic number, because the mean of its divisors is an integer number (15077412).

Almost surely, 2^155359939 is an apocalyptic number.

155359939 is a deficient number, since it is larger than the sum of its proper divisors (25569005).

155359939 is a wasteful number, since it uses less digits than its factorization.

155359939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594 (or 3587 counting only the distinct ones).

The product of its digits is 820125, while the sum is 49.

The square root of 155359939 is about 12464.3467137271. The cubic root of 155359939 is about 537.5840159997.

The spelling of 155359939 in words is "one hundred fifty-five million, three hundred fifty-nine thousand, nine hundred thirty-nine".