130551021 has 24 divisors (see below), whose sum is σ = 197424864. Its totient is φ = 86203440.

The previous prime is 130551019. The next prime is 130551067. The reversal of 130551021 is 120155031.

130551021 is a `hidden beast` number, since 130 + 5 + 510 + 21 = 666.

It is not a de Polignac number, because 130551021 - 2¹ = 130551019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 130550985 and 130551003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130553021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23491 + ... + 28511.

It is an arithmetic number, because the mean of its divisors is an integer number (8226036).

Almost surely, 2^130551021 is an apocalyptic number.

It is an amenable number.

130551021 is a deficient number, since it is larger than the sum of its proper divisors (66873843).

130551021 is an equidigital number, since it uses as much as digits as its factorization.

130551021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5143 (or 5131 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 130551021 is about 11425.8925690731. The cubic root of 130551021 is about 507.2944265148.

It can be divided in two parts, 1305 and 51021, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 130551021 in words is "one hundred thirty million, five hundred fifty-one thousand, twenty-one".