525551201023 has 4 divisors (see below), whose sum is σ = 531883143288. Its totient is φ = 519219258760.

The previous prime is 525551201017. The next prime is 525551201029. The reversal of 525551201023 is 320102155525.

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

It is an interprime number because it is at equal distance from previous prime (525551201017) and next prime (525551201029).

It is a de Polignac number, because none of the positive numbers 2^k-525551201023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525551201029) 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, 3165971008 + ... + 3165971173.

It is an arithmetic number, because the mean of its divisors is an integer number (132970785822).

Almost surely, 2^525551201023 is an apocalyptic number.

525551201023 is a deficient number, since it is larger than the sum of its proper divisors (6331942265).

525551201023 is an equidigital number, since it uses as much as digits as its factorization.

525551201023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6331942264.

The product of its (nonzero) digits is 15000, while the sum is 31.

Adding to 525551201023 its reverse (320102155525), we get a palindrome (845653356548).

The spelling of 525551201023 in words is "five hundred twenty-five billion, five hundred fifty-one million, two hundred one thousand, twenty-three".