281464013 has 4 divisors (see below), whose sum is σ = 284626620. Its totient is φ = 278301408.

The previous prime is 281464009. The next prime is 281464021. The reversal of 281464013 is 310464182.

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 28590409 + 252873604 = 5347^2 + 15902^2 .

It is a cyclic number.

It is not a de Polignac number, because 281464013 - 2² = 281464009 is a prime.

It is a super-2 number, since 2×281464013² = 158443981228128338, 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 (281464033) 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, 1581170 + ... + 1581347.

It is an arithmetic number, because the mean of its divisors is an integer number (71156655).

Almost surely, 2^281464013 is an apocalyptic number.

It is an amenable number.

281464013 is a deficient number, since it is larger than the sum of its proper divisors (3162607).

281464013 is an equidigital number, since it uses as much as digits as its factorization.

281464013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162606.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 281464013 is about 16776.8892527787. The cubic root of 281464013 is about 655.3514909302.

The spelling of 281464013 in words is "two hundred eighty-one million, four hundred sixty-four thousand, thirteen".