251606141 has 4 divisors (see below), whose sum is σ = 251956800. Its totient is φ = 251255484.

The previous prime is 251606129. The next prime is 251606143. The reversal of 251606141 is 141606152.

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 a de Polignac number, because none of the positive numbers 2^k-251606141 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 251606141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251606143) 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, 174251 + ... + 175688.

It is an arithmetic number, because the mean of its divisors is an integer number (62989200).

Almost surely, 2^251606141 is an apocalyptic number.

It is an amenable number.

251606141 is a deficient number, since it is larger than the sum of its proper divisors (350659).

251606141 is an equidigital number, since it uses as much as digits as its factorization.

251606141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350658.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 251606141 is about 15862.0976229501. The cubic root of 251606141 is about 631.3067200479.

The spelling of 251606141 in words is "two hundred fifty-one million, six hundred six thousand, one hundred forty-one".