2545481397 has 4 divisors (see below), whose sum is σ = 3393975200. Its totient is φ = 1696987596.

The previous prime is 2545481359. The next prime is 2545481441. The reversal of 2545481397 is 7931845452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2545481397 - 2¹⁰ = 2545480373 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 (2545481347) 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, 424246897 + ... + 424246902.

It is an arithmetic number, because the mean of its divisors is an integer number (848493800).

Almost surely, 2^2545481397 is an apocalyptic number.

It is an amenable number.

2545481397 is a deficient number, since it is larger than the sum of its proper divisors (848493803).

2545481397 is an equidigital number, since it uses as much as digits as its factorization.

2545481397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848493802.

The product of its digits is 1209600, while the sum is 48.

The square root of 2545481397 is about 50452.7640174451. The cubic root of 2545481397 is about 1365.3897632416.

The spelling of 2545481397 in words is "two billion, five hundred forty-five million, four hundred eighty-one thousand, three hundred ninety-seven".