155340031 has 8 divisors (see below), whose sum is σ = 193670784. Its totient is φ = 121044120.

The previous prime is 155340019. The next prime is 155340041. The reversal of 155340031 is 130043551.

It is a happy number.

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 155340031 - 2⁷ = 155339903 is a prime.

It is a super-2 number, since 2×155340031² = 48261050462161922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155339984 and 155340011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155340041) 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, 1008625 + ... + 1008778.

It is an arithmetic number, because the mean of its divisors is an integer number (24208848).

Almost surely, 2^155340031 is an apocalyptic number.

155340031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155340031 is a deficient number, since it is larger than the sum of its proper divisors (38330753).

155340031 is a wasteful number, since it uses less digits than its factorization.

155340031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017421.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 155340031 is about 12463.5480903313. The cubic root of 155340031 is about 537.5610528090.

Adding to 155340031 its reverse (130043551), we get a palindrome (285383582).

The spelling of 155340031 in words is "one hundred fifty-five million, three hundred forty thousand, thirty-one".