1531742453 has 4 divisors (see below), whose sum is σ = 1560643308. Its totient is φ = 1502841600.

The previous prime is 1531742417. The next prime is 1531742461. The reversal of 1531742453 is 3542471351.

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 1315005169 + 216737284 = 36263^2 + 14722^2 .

It is a cyclic number.

It is not a de Polignac number, because 1531742453 - 2⁶ = 1531742389 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 (1531742413) 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, 14450348 + ... + 14450453.

It is an arithmetic number, because the mean of its divisors is an integer number (390160827).

Almost surely, 2^1531742453 is an apocalyptic number.

It is an amenable number.

1531742453 is a deficient number, since it is larger than the sum of its proper divisors (28900855).

1531742453 is an equidigital number, since it uses as much as digits as its factorization.

1531742453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28900854.

The product of its digits is 50400, while the sum is 35.

The square root of 1531742453 is about 39137.4814340422. The cubic root of 1531742453 is about 1152.7326202166.

The spelling of 1531742453 in words is "one billion, five hundred thirty-one million, seven hundred forty-two thousand, four hundred fifty-three".