42451204240 has 40 divisors (see below), whose sum is σ = 99244382328. Its totient is φ = 16886661120.

The previous prime is 42451204223. The next prime is 42451204261. The reversal of 42451204240 is 4240215424.

It can be written as a sum of positive squares in 4 ways, for example, as 1774768384 + 40676435856 = 42128^2 + 201684^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 42451204199 and 42451204208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1451377 + ... + 1480336.

Almost surely, 2^42451204240 is an apocalyptic number.

42451204240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42451204240 is an abundant number, since it is smaller than the sum of its proper divisors (56793178088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42451204240 is a wasteful number, since it uses less digits than its factorization.

42451204240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931907 (or 2931901 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

Adding to 42451204240 its reverse (4240215424), we get a palindrome (46691419664).

The spelling of 42451204240 in words is "forty-two billion, four hundred fifty-one million, two hundred four thousand, two hundred forty".