155131894 has 8 divisors (see below), whose sum is σ = 232786368. Its totient is φ = 77536440.

The previous prime is 155131891. The next prime is 155131909. The reversal of 155131894 is 498131551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155131891) 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, 7462 + ... + 19129.

It is an arithmetic number, because the mean of its divisors is an integer number (29098296).

Almost surely, 2^155131894 is an apocalyptic number.

155131894 is a deficient number, since it is larger than the sum of its proper divisors (77654474).

155131894 is a wasteful number, since it uses less digits than its factorization.

155131894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29510.

The product of its digits is 21600, while the sum is 37.

The square root of 155131894 is about 12455.1954621355. The cubic root of 155131894 is about 537.3208563986.

It can be divided in two parts, 155131 and 894, that added together give a square (156025 = 395²).

The spelling of 155131894 in words is "one hundred fifty-five million, one hundred thirty-one thousand, eight hundred ninety-four".