1545473213 has 4 divisors (see below), whose sum is σ = 1636383420. Its totient is φ = 1454563008.

The previous prime is 1545473207. The next prime is 1545473227. The reversal of 1545473213 is 3123745451.

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 1181503129 + 363970084 = 34373^2 + 19078^2 .

It is a cyclic number.

It is not a de Polignac number, because 1545473213 - 2²² = 1541278909 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 (1545473233) 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, 45455078 + ... + 45455111.

It is an arithmetic number, because the mean of its divisors is an integer number (409095855).

Almost surely, 2^1545473213 is an apocalyptic number.

It is an amenable number.

1545473213 is a deficient number, since it is larger than the sum of its proper divisors (90910207).

1545473213 is an equidigital number, since it uses as much as digits as its factorization.

1545473213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90910206.

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

The square root of 1545473213 is about 39312.5070810804. The cubic root of 1545473213 is about 1156.1667994946.

The spelling of 1545473213 in words is "one billion, five hundred forty-five million, four hundred seventy-three thousand, two hundred thirteen".