155406031 has 32 divisors (see below), whose sum is σ = 182327040. Its totient is φ = 131155200.

The previous prime is 155406023. The next prime is 155406067. The reversal of 155406031 is 130604551.

It is not a de Polignac number, because 155406031 - 2³ = 155406023 is a prime.

It is a super-2 number, since 2×155406031² = 48302068942345922, 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 = 155405987 and 155406005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155406001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1117960 + ... + 1118098.

It is an arithmetic number, because the mean of its divisors is an integer number (5697720).

Almost surely, 2^155406031 is an apocalyptic number.

155406031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155406031 is a deficient number, since it is larger than the sum of its proper divisors (26921009).

155406031 is a wasteful number, since it uses less digits than its factorization.

155406031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 155406031 is about 12466.1955303132. The cubic root of 155406031 is about 537.6371740031.

The spelling of 155406031 in words is "one hundred fifty-five million, four hundred six thousand, thirty-one".