276401221 has 8 divisors (see below), whose sum is σ = 279564480. Its totient is φ = 273247392.

The previous prime is 276401207. The next prime is 276401231. The reversal of 276401221 is 122104672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 276401221 - 2⁷ = 276401093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276401231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68385 + ... + 72313.

It is an arithmetic number, because the mean of its divisors is an integer number (34945560).

Almost surely, 2^276401221 is an apocalyptic number.

It is an amenable number.

276401221 is a deficient number, since it is larger than the sum of its proper divisors (3163259).

276401221 is a wasteful number, since it uses less digits than its factorization.

276401221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4715.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 276401221 is about 16625.3186736375. The cubic root of 276401221 is about 651.3983473639.

Adding to 276401221 its reverse (122104672), we get a palindrome (398505893).

The spelling of 276401221 in words is "two hundred seventy-six million, four hundred one thousand, two hundred twenty-one".