421052525731 has 4 divisors (see below), whose sum is σ = 443213185000. Its totient is φ = 398891866464.

The previous prime is 421052525723. The next prime is 421052525743. The reversal of 421052525731 is 137525250124.

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

It is a cyclic number.

It is not a de Polignac number, because 421052525731 - 2³ = 421052525723 is a prime.

It is a super-2 number, since 2×421052525731² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421052525791) 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, 11080329606 + ... + 11080329643.

It is an arithmetic number, because the mean of its divisors is an integer number (110803296250).

Almost surely, 2^421052525731 is an apocalyptic number.

421052525731 is a deficient number, since it is larger than the sum of its proper divisors (22160659269).

421052525731 is a wasteful number, since it uses less digits than its factorization.

421052525731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22160659268.

The product of its (nonzero) digits is 84000, while the sum is 37.

Adding to 421052525731 its reverse (137525250124), we get a palindrome (558577775855).

The spelling of 421052525731 in words is "four hundred twenty-one billion, fifty-two million, five hundred twenty-five thousand, seven hundred thirty-one".