249500381 has 16 divisors (see below), whose sum is σ = 299476800. Its totient is φ = 205348608.

The previous prime is 249500357. The next prime is 249500411. The reversal of 249500381 is 183005942.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249500381 is a prime.

It is a super-2 number, since 2×249500381² = 124500880238290322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249503381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25511 + ... + 33908.

It is an arithmetic number, because the mean of its divisors is an integer number (18717300).

Almost surely, 2^249500381 is an apocalyptic number.

It is an amenable number.

249500381 is a deficient number, since it is larger than the sum of its proper divisors (49976419).

249500381 is a wasteful number, since it uses less digits than its factorization.

249500381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59468.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 249500381 is about 15795.5810592710. The cubic root of 249500381 is about 629.5405914174.

The spelling of 249500381 in words is "two hundred forty-nine million, five hundred thousand, three hundred eighty-one".