155963381 has 8 divisors (see below), whose sum is σ = 187625280. Its totient is φ = 126646848.

The previous prime is 155963369. The next prime is 155963417. The reversal of 155963381 is 183369551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155963381 - 2⁶ = 155963317 is a prime.

It is a super-2 number, since 2×155963381² = 48649152425902322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155963341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586196 + ... + 586461.

It is an arithmetic number, because the mean of its divisors is an integer number (23453160).

Almost surely, 2^155963381 is an apocalyptic number.

It is an amenable number.

155963381 is a deficient number, since it is larger than the sum of its proper divisors (31661899).

155963381 is a wasteful number, since it uses less digits than its factorization.

155963381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172683.

The product of its digits is 97200, while the sum is 41.

The square root of 155963381 is about 12488.5299775434. The cubic root of 155963381 is about 538.2791365743.

The spelling of 155963381 in words is "one hundred fifty-five million, nine hundred sixty-three thousand, three hundred eighty-one".