42515232451 has 4 divisors (see below), whose sum is σ = 42580944432. Its totient is φ = 42449520472.

The previous prime is 42515232439. The next prime is 42515232467. The reversal of 42515232451 is 15423251524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42515232451 - 2²⁷ = 42381014723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42515232251) 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, 32855020 + ... + 32856313.

It is an arithmetic number, because the mean of its divisors is an integer number (10645236108).

Almost surely, 2^42515232451 is an apocalyptic number.

42515232451 is a deficient number, since it is larger than the sum of its proper divisors (65711981).

42515232451 is an equidigital number, since it uses as much as digits as its factorization.

42515232451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65711980.

The product of its digits is 48000, while the sum is 34.

Adding to 42515232451 its reverse (15423251524), we get a palindrome (57938483975).

The spelling of 42515232451 in words is "forty-two billion, five hundred fifteen million, two hundred thirty-two thousand, four hundred fifty-one".