265422001381 has 4 divisors (see below), whose sum is σ = 266090571052. Its totient is φ = 264753431712.

The previous prime is 265422001363. The next prime is 265422001409. The reversal of 265422001381 is 183100224562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183100224562 = 2 ⋅91550112281.

It can be written as a sum of positive squares in 2 ways, for example, as 129880952100 + 135541049281 = 360390^2 + 368159^2 .

It is a cyclic number.

It is not a de Polignac number, because 265422001381 - 2³⁷ = 127983047909 is a prime.

It is a super-2 number, since 2×265422001381² (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 (265422001331) 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, 334284240 + ... + 334285033.

It is an arithmetic number, because the mean of its divisors is an integer number (66522642763).

Almost surely, 2^265422001381 is an apocalyptic number.

It is an amenable number.

265422001381 is a deficient number, since it is larger than the sum of its proper divisors (668569671).

265422001381 is an equidigital number, since it uses as much as digits as its factorization.

265422001381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668569670.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 265422001381 in words is "two hundred sixty-five billion, four hundred twenty-two million, one thousand, three hundred eighty-one".