250405475381 has 4 divisors (see below), whose sum is σ = 250487283564. Its totient is φ = 250323667200.

The previous prime is 250405475273. The next prime is 250405475389. The reversal of 250405475381 is 183574504052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 245486557156 + 4918918225 = 495466^2 + 70135^2 .

It is a cyclic number.

It is not a de Polignac number, because 250405475381 - 2¹⁴ = 250405458997 is a prime.

It is a super-2 number, since 2×250405475381² (a number of 24 digits) 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 (250405475389) 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, 40899500 + ... + 40905621.

It is an arithmetic number, because the mean of its divisors is an integer number (62621820891).

Almost surely, 2^250405475381 is an apocalyptic number.

It is an amenable number.

250405475381 is a deficient number, since it is larger than the sum of its proper divisors (81808183).

250405475381 is an equidigital number, since it uses as much as digits as its factorization.

250405475381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81808182.

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 250405475381 in words is "two hundred fifty billion, four hundred five million, four hundred seventy-five thousand, three hundred eighty-one".