249901157 has 4 divisors (see below), whose sum is σ = 272619456. Its totient is φ = 227182860.

The previous prime is 249901133. The next prime is 249901163. The reversal of 249901157 is 751109942.

249901157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249901157 - 2¹⁴ = 249884773 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249901157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249901117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11359133 + ... + 11359154.

It is an arithmetic number, because the mean of its divisors is an integer number (68154864).

Almost surely, 2^249901157 is an apocalyptic number.

It is an amenable number.

249901157 is a deficient number, since it is larger than the sum of its proper divisors (22718299).

249901157 is a wasteful number, since it uses less digits than its factorization.

249901157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22718298.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 249901157 is about 15808.2623017206. The cubic root of 249901157 is about 629.8774910858.

The spelling of 249901157 in words is "two hundred forty-nine million, nine hundred one thousand, one hundred fifty-seven".