7145531442 has 24 divisors (see below), whose sum is σ = 17693697216. Its totient is φ = 2041580376.

The previous prime is 7145531431. The next prime is 7145531467. The reversal of 7145531442 is 2441355417.

It is a super-2 number, since 2×7145531442² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7145531397 and 7145531406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28355158 + ... + 28355409.

It is an arithmetic number, because the mean of its divisors is an integer number (737237384).

Almost surely, 2^7145531442 is an apocalyptic number.

7145531442 is an abundant number, since it is smaller than the sum of its proper divisors (10548165774).

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

7145531442 is a wasteful number, since it uses less digits than its factorization.

7145531442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56710582 (or 56710579 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 7145531442 is about 84531.2453593344. The cubic root of 7145531442 is about 1926.0971036985.

Adding to 7145531442 its reverse (2441355417), we get a palindrome (9586886859).

The spelling of 7145531442 in words is "seven billion, one hundred forty-five million, five hundred thirty-one thousand, four hundred forty-two".