155381992 has 16 divisors (see below), whose sum is σ = 292226400. Its totient is φ = 77454960.

The previous prime is 155381983. The next prime is 155382001. The reversal of 155381992 is 299183551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (155381983) and next prime (155382001).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26692 + ... + 31987.

It is an arithmetic number, because the mean of its divisors is an integer number (18264150).

Almost surely, 2^155381992 is an apocalyptic number.

It is an amenable number.

155381992 is a deficient number, since it is larger than the sum of its proper divisors (136844408).

155381992 is a wasteful number, since it uses less digits than its factorization.

155381992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59016 (or 59012 counting only the distinct ones).

The product of its digits is 97200, while the sum is 43.

The square root of 155381992 is about 12465.2313255711. The cubic root of 155381992 is about 537.6094510840.

The spelling of 155381992 in words is "one hundred fifty-five million, three hundred eighty-one thousand, nine hundred ninety-two".