155941631 has 4 divisors (see below), whose sum is σ = 158138064. Its totient is φ = 153745200.

The previous prime is 155941567. The next prime is 155941657. The reversal of 155941631 is 136149551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136149551 = 31 ⋅4391921.

It is a cyclic number.

It is not a de Polignac number, because 155941631 - 2⁶ = 155941567 is a prime.

It is a super-2 number, since 2×155941631² = 48635584557880322, 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 = 155941591 and 155941600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155946631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098110 + ... + 1098251.

It is an arithmetic number, because the mean of its divisors is an integer number (39534516).

Almost surely, 2^155941631 is an apocalyptic number.

155941631 is a deficient number, since it is larger than the sum of its proper divisors (2196433).

155941631 is an equidigital number, since it uses as much as digits as its factorization.

155941631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2196432.

The product of its digits is 16200, while the sum is 35.

The square root of 155941631 is about 12487.6591481350. The cubic root of 155941631 is about 538.2541133596.

The spelling of 155941631 in words is "one hundred fifty-five million, nine hundred forty-one thousand, six hundred thirty-one".