523023540 has 48 divisors (see below), whose sum is σ = 1577119488. Its totient is φ = 128744064.

The previous prime is 523023517. The next prime is 523023563. The reversal of 523023540 is 45320325.

It is an interprime number because it is at equal distance from previous prime (523023517) and next prime (523023563).

It is a self number, because there is not a number n which added to its sum of digits gives 523023540.

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, 334492 + ... + 336051.

It is an arithmetic number, because the mean of its divisors is an integer number (32856656).

Almost surely, 2^523023540 is an apocalyptic number.

It is an amenable number.

523023540 is an abundant number, since it is smaller than the sum of its proper divisors (1054095948).

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

523023540 is a wasteful number, since it uses less digits than its factorization.

523023540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670568 (or 670566 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 523023540 is about 22869.7079124330. The cubic root of 523023540 is about 805.7007080030.

Adding to 523023540 its reverse (45320325), we get a palindrome (568343865).

The spelling of 523023540 in words is "five hundred twenty-three million, twenty-three thousand, five hundred forty".