155906413 has 8 divisors (see below), whose sum is σ = 168293048. Its totient is φ = 143576064.

The previous prime is 155906393. The next prime is 155906417. The reversal of 155906413 is 314609551.

It can be written as a sum of positive squares in 4 ways, for example, as 19554084 + 136352329 = 4422^2 + 11677^2 .

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 155906413 - 2¹³ = 155898221 is a prime.

It is a super-2 number, since 2×155906413² = 48613619229053138, 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 (155906417) 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, 8220 + ... + 19477.

It is an arithmetic number, because the mean of its divisors is an integer number (21036631).

Almost surely, 2^155906413 is an apocalyptic number.

155906413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

155906413 is a deficient number, since it is larger than the sum of its proper divisors (12386635).

155906413 is a wasteful number, since it uses less digits than its factorization.

155906413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28143.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 155906413 is about 12486.2489563519. The cubic root of 155906413 is about 538.2135903758.

The spelling of 155906413 in words is "one hundred fifty-five million, nine hundred six thousand, four hundred thirteen".