249551061 has 32 divisors (see below), whose sum is σ = 356227200. Its totient is φ = 155124480.

The previous prime is 249551053. The next prime is 249551069. The reversal of 249551061 is 160155942.

It is an interprime number because it is at equal distance from previous prime (249551053) and next prime (249551069).

It is not a de Polignac number, because 249551061 - 2³ = 249551053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249551069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 312715 + ... + 313511.

It is an arithmetic number, because the mean of its divisors is an integer number (11132100).

Almost surely, 2^249551061 is an apocalyptic number.

It is an amenable number.

249551061 is a deficient number, since it is larger than the sum of its proper divisors (106676139).

249551061 is a wasteful number, since it uses less digits than its factorization.

249551061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 249551061 is about 15797.1852239568. The cubic root of 249551061 is about 629.5832138735.

The spelling of 249551061 in words is "two hundred forty-nine million, five hundred fifty-one thousand, sixty-one".