421052531 has 2 divisors, whose sum is σ = 421052532. Its totient is φ = 421052530.

The previous prime is 421052473. The next prime is 421052543. The reversal of 421052531 is 135250124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421052531 is a prime.

It is a super-2 number, since 2×421052531² = 354570467723011922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421052497 and 421052506.

It is not a weakly prime, because it can be changed into another prime (421052551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210526265 + 210526266.

It is an arithmetic number, because the mean of its divisors is an integer number (210526266).

Almost surely, 2^421052531 is an apocalyptic number.

421052531 is a deficient number, since it is larger than the sum of its proper divisors (1).

421052531 is an equidigital number, since it uses as much as digits as its factorization.

421052531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 421052531 is about 20519.5645908971. The cubic root of 421052531 is about 749.5122938887.

The spelling of 421052531 in words is "four hundred twenty-one million, fifty-two thousand, five hundred thirty-one".