155249448 has 32 divisors (see below), whose sum is σ = 405000000. Its totient is φ = 49499648.

The previous prime is 155249443. The next prime is 155249449. The reversal of 155249448 is 844942551.

It is a super-2 number, since 2×155249448² = 48204782208609408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155249443) 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, 140073 + ... + 141176.

It is an arithmetic number, because the mean of its divisors is an integer number (12656250).

Almost surely, 2^155249448 is an apocalyptic number.

It is an amenable number.

155249448 is an abundant number, since it is smaller than the sum of its proper divisors (249750552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155249448 is a wasteful number, since it uses less digits than its factorization.

155249448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281281 (or 281277 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 155249448 is about 12459.9136433605. The cubic root of 155249448 is about 537.4565436653.

The spelling of 155249448 in words is "one hundred fifty-five million, two hundred forty-nine thousand, four hundred forty-eight".