440051321 has 2 divisors, whose sum is σ = 440051322. Its totient is φ = 440051320.

The previous prime is 440051291. The next prime is 440051371. The reversal of 440051321 is 123150044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281568400 + 158482921 = 16780^2 + 12589^2 .

It is a cyclic number.

It is not a de Polignac number, because 440051321 - 2⁶ = 440051257 is a prime.

It is a super-2 number, since 2×440051321² = 387290330227690082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 440051293 and 440051302.

It is not a weakly prime, because it can be changed into another prime (440051371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220025660 + 220025661.

It is an arithmetic number, because the mean of its divisors is an integer number (220025661).

Almost surely, 2^440051321 is an apocalyptic number.

It is an amenable number.

440051321 is a deficient number, since it is larger than the sum of its proper divisors (1).

440051321 is an equidigital number, since it uses as much as digits as its factorization.

440051321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 440051321 is about 20977.4002440722. The cubic root of 440051321 is about 760.6200624152.

The spelling of 440051321 in words is "four hundred forty million, fifty-one thousand, three hundred twenty-one".