155431204 has 24 divisors (see below), whose sum is σ = 288852480. Its totient is φ = 72928896.

The previous prime is 155431201. The next prime is 155431247. The reversal of 155431204 is 402134551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (155431201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21229 + ... + 27595.

It is an arithmetic number, because the mean of its divisors is an integer number (12035520).

Almost surely, 2^155431204 is an apocalyptic number.

It is an amenable number.

155431204 is a deficient number, since it is larger than the sum of its proper divisors (133421276).

155431204 is a wasteful number, since it uses less digits than its factorization.

155431204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6747 (or 6745 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 155431204 is about 12467.2051398860. The cubic root of 155431204 is about 537.6662016408. Note that the first 3 decimals are identical.

Adding to 155431204 its reverse (402134551), we get a palindrome (557565755).

The spelling of 155431204 in words is "one hundred fifty-five million, four hundred thirty-one thousand, two hundred four".