155431964 has 12 divisors (see below), whose sum is σ = 272498184. Its totient is φ = 77575344.

The previous prime is 155431963. The next prime is 155431979. The reversal of 155431964 is 469134551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155431963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32654 + ... + 37109.

It is an arithmetic number, because the mean of its divisors is an integer number (22708182).

Almost surely, 2^155431964 is an apocalyptic number.

It is an amenable number.

155431964 is a deficient number, since it is larger than the sum of its proper divisors (117066220).

155431964 is a wasteful number, since it uses less digits than its factorization.

155431964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70324 (or 70322 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 155431964 is about 12467.2356198156. The cubic root of 155431964 is about 537.6670779677.

The spelling of 155431964 in words is "one hundred fifty-five million, four hundred thirty-one thousand, nine hundred sixty-four".