2451540242 has 18 divisors (see below), whose sum is σ = 3717552213. Its totient is φ = 1212500952.

The previous prime is 2451540229. The next prime is 2451540283. The reversal of 2451540242 is 2420451542.

It can be written as a sum of positive squares in 2 ways, for example, as 2341688881 + 109851361 = 48391^2 + 10481^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=35011.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10993343 + ... + 10993565.

Almost surely, 2^2451540242 is an apocalyptic number.

2451540242 is a deficient number, since it is larger than the sum of its proper divisors (1266011971).

2451540242 is an frugal number, since it uses more digits than its factorization.

2451540242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 2451540242 is about 49513.0310322444. The cubic root of 2451540242 is about 1348.3821940897.

Multiplying 2451540242 by its product of nonzero digits (12800), we get a square (31379715097600 = 5601760²).

Adding to 2451540242 its reverse (2420451542), we get a palindrome (4871991784).

The spelling of 2451540242 in words is "two billion, four hundred fifty-one million, five hundred forty thousand, two hundred forty-two".