2545747731 has 8 divisors (see below), whose sum is σ = 3771478160. Its totient is φ = 1697165136.

The previous prime is 2545747727. The next prime is 2545747747. The reversal of 2545747731 is 1377475452.

2545747731 is a `hidden beast` number, since 2 + 5 + 4 + 574 + 7 + 73 + 1 = 666.

It is not a de Polignac number, because 2545747731 - 2² = 2545747727 is a prime.

It is a super-3 number, since 3×2545747731³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545747751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47143450 + ... + 47143503.

It is an arithmetic number, because the mean of its divisors is an integer number (471434770).

Almost surely, 2^2545747731 is an apocalyptic number.

2545747731 is a deficient number, since it is larger than the sum of its proper divisors (1225730429).

2545747731 is an equidigital number, since it uses as much as digits as its factorization.

2545747731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94286962 (or 94286956 counting only the distinct ones).

The product of its digits is 823200, while the sum is 45.

The square root of 2545747731 is about 50455.4033875461. The cubic root of 2545747731 is about 1365.4373818748.

The spelling of 2545747731 in words is "two billion, five hundred forty-five million, seven hundred forty-seven thousand, seven hundred thirty-one".