249228145 has 16 divisors (see below), whose sum is σ = 303367680. Its totient is φ = 196539264.

The previous prime is 249228137. The next prime is 249228151. The reversal of 249228145 is 541822942.

It is a cyclic number.

It is not a de Polignac number, because 249228145 - 2³ = 249228137 is a prime.

It is a super-2 number, since 2×249228145² = 124229336520282050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118261 + ... + 120349.

It is an arithmetic number, because the mean of its divisors is an integer number (18960480).

Almost surely, 2^249228145 is an apocalyptic number.

It is an amenable number.

249228145 is a deficient number, since it is larger than the sum of its proper divisors (54139535).

249228145 is a wasteful number, since it uses less digits than its factorization.

249228145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424.

The product of its digits is 46080, while the sum is 37.

The square root of 249228145 is about 15786.9612338791. The cubic root of 249228145 is about 629.3115390165.

The spelling of 249228145 in words is "two hundred forty-nine million, two hundred twenty-eight thousand, one hundred forty-five".