1331437453 has 4 divisors (see below), whose sum is σ = 1331510940. Its totient is φ = 1331363968.

The previous prime is 1331437451. The next prime is 1331437463. The reversal of 1331437453 is 3547341331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 502746084 + 828691369 = 22422^2 + 28787^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331437453 - 2¹ = 1331437451 is a prime.

It is a super-2 number, since 2×1331437453² = 3545451382502254418, 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 (1331437451) 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, 11901 + ... + 52957.

It is an arithmetic number, because the mean of its divisors is an integer number (332877735).

Almost surely, 2^1331437453 is an apocalyptic number.

It is an amenable number.

1331437453 is a deficient number, since it is larger than the sum of its proper divisors (73487).

1331437453 is an equidigital number, since it uses as much as digits as its factorization.

1331437453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73486.

The product of its digits is 45360, while the sum is 34.

The square root of 1331437453 is about 36488.8675214784. The cubic root of 1331437453 is about 1100.1204972682.

Adding to 1331437453 its reverse (3547341331), we get a palindrome (4878778784).

The spelling of 1331437453 in words is "one billion, three hundred thirty-one million, four hundred thirty-seven thousand, four hundred fifty-three".