249155972 has 12 divisors (see below), whose sum is σ = 469563276. Its totient is φ = 114995040.

The previous prime is 249155953. The next prime is 249155989. The reversal of 249155972 is 279551942.

249155972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 35236096 + 213919876 = 5936^2 + 14626^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2395679 + ... + 2395782.

It is an arithmetic number, because the mean of its divisors is an integer number (39130273).

Almost surely, 2^249155972 is an apocalyptic number.

It is an amenable number.

249155972 is a deficient number, since it is larger than the sum of its proper divisors (220407304).

249155972 is a wasteful number, since it uses less digits than its factorization.

249155972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791478 (or 4791476 counting only the distinct ones).

The product of its digits is 226800, while the sum is 44.

The square root of 249155972 is about 15784.6752263073. The cubic root of 249155972 is about 629.2507865325.

The spelling of 249155972 in words is "two hundred forty-nine million, one hundred fifty-five thousand, nine hundred seventy-two".