1445540331 has 8 divisors (see below), whose sum is σ = 1972210240. Its totient is φ = 941281992.

The previous prime is 1445540303. The next prime is 1445540339. The reversal of 1445540331 is 1330455441.

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

It is not a de Polignac number, because 1445540331 - 2⁶ = 1445540267 is a prime.

It is a super-2 number, since 2×1445540331² = 4179173697095179122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445540339) 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, 5602741 + ... + 5602998.

It is an arithmetic number, because the mean of its divisors is an integer number (246526280).

Almost surely, 2^1445540331 is an apocalyptic number.

1445540331 is a deficient number, since it is larger than the sum of its proper divisors (526669909).

1445540331 is a wasteful number, since it uses less digits than its factorization.

1445540331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11205785.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1445540331 is about 38020.2621111428. The cubic root of 1445540331 is about 1130.6896176890.

Adding to 1445540331 its reverse (1330455441), we get a palindrome (2775995772).

The spelling of 1445540331 in words is "one billion, four hundred forty-five million, five hundred forty thousand, three hundred thirty-one".