511521142 has 32 divisors (see below), whose sum is σ = 868608000. Its totient is φ = 223819200.

The previous prime is 511521137. The next prime is 511521151. The reversal of 511521142 is 241125115.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133834 + ... + 137602.

It is an arithmetic number, because the mean of its divisors is an integer number (27144000).

Almost surely, 2^511521142 is an apocalyptic number.

511521142 is a deficient number, since it is larger than the sum of its proper divisors (357086858).

511521142 is a wasteful number, since it uses less digits than its factorization.

511521142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012.

The product of its digits is 400, while the sum is 22.

The square root of 511521142 is about 22616.8331558598. The cubic root of 511521142 is about 799.7505169975.

Adding to 511521142 its reverse (241125115), we get a palindrome (752646257).

The spelling of 511521142 in words is "five hundred eleven million, five hundred twenty-one thousand, one hundred forty-two".