2145142550521 has 16 divisors (see below), whose sum is σ = 2344699146240. Its totient is φ = 1953744099840.

The previous prime is 2145142550483. The next prime is 2145142550539. The reversal of 2145142550521 is 1250552415412.

It is not a de Polignac number, because 2145142550521 - 2¹³ = 2145142542329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145142551521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14010040 + ... + 14162326.

It is an arithmetic number, because the mean of its divisors is an integer number (146543696640).

Almost surely, 2^{2145142550521} is an apocalyptic number.

It is an amenable number.

2145142550521 is a deficient number, since it is larger than the sum of its proper divisors (199556595719).

2145142550521 is a wasteful number, since it uses less digits than its factorization.

2145142550521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179064.

The product of its (nonzero) digits is 80000, while the sum is 37.

Adding to 2145142550521 its reverse (1250552415412), we get a palindrome (3395694965933).

The spelling of 2145142550521 in words is "two trillion, one hundred forty-five billion, one hundred forty-two million, five hundred fifty thousand, five hundred twenty-one".