155391892 has 6 divisors (see below), whose sum is σ = 271935818. Its totient is φ = 77695944.

The previous prime is 155391857. The next prime is 155391893. The reversal of 155391892 is 298193551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 154853136 + 538756 = 12444^2 + 734^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155391893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19423983 + ... + 19423990.

Almost surely, 2^155391892 is an apocalyptic number.

It is an amenable number.

155391892 is a deficient number, since it is larger than the sum of its proper divisors (116543926).

155391892 is a wasteful number, since it uses less digits than its factorization.

155391892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38847977 (or 38847975 counting only the distinct ones).

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

The square root of 155391892 is about 12465.6284237900. The cubic root of 155391892 is about 537.6208685815.

The spelling of 155391892 in words is "one hundred fifty-five million, three hundred ninety-one thousand, eight hundred ninety-two".