130421531 has 2 divisors, whose sum is σ = 130421532. Its totient is φ = 130421530.

The previous prime is 130421527. The next prime is 130421573. The reversal of 130421531 is 135124031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 130421531 - 2² = 130421527 is a prime.

It is a super-2 number, since 2×130421531² = 34019551496767922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (130421591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65210765 + 65210766.

It is an arithmetic number, because the mean of its divisors is an integer number (65210766).

Almost surely, 2^130421531 is an apocalyptic number.

130421531 is a deficient number, since it is larger than the sum of its proper divisors (1).

130421531 is an equidigital number, since it uses as much as digits as its factorization.

130421531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 130421531 is about 11420.2246475277. The cubic root of 130421531 is about 507.1266471916.

Adding to 130421531 its reverse (135124031), we get a palindrome (265545562).

The spelling of 130421531 in words is "one hundred thirty million, four hundred twenty-one thousand, five hundred thirty-one".