249998156 has 12 divisors (see below), whose sum is σ = 448167720. Its totient is φ = 121950240.

The previous prime is 249998131. The next prime is 249998213. The reversal of 249998156 is 651899942.

It is a junction number, because it is equal to n+sod(n) for n = 249998098 and 249998107.

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, 762026 + ... + 762353.

It is an arithmetic number, because the mean of its divisors is an integer number (37347310).

Almost surely, 2^249998156 is an apocalyptic number.

It is an amenable number.

249998156 is a deficient number, since it is larger than the sum of its proper divisors (198169564).

249998156 is a wasteful number, since it uses less digits than its factorization.

249998156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524424 (or 1524422 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 53.

The square root of 249998156 is about 15811.3299883343. The cubic root of 249998156 is about 629.9589760807.

The spelling of 249998156 in words is "two hundred forty-nine million, nine hundred ninety-eight thousand, one hundred fifty-six".