2061526421 has 2 divisors, whose sum is σ = 2061526422. Its totient is φ = 2061526420.

The previous prime is 2061526387. The next prime is 2061526459. The reversal of 2061526421 is 1246251602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2051093521 + 10432900 = 45289^2 + 3230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2061526421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061526321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030763210 + 1030763211.

It is an arithmetic number, because the mean of its divisors is an integer number (1030763211).

Almost surely, 2^2061526421 is an apocalyptic number.

It is an amenable number.

2061526421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061526421 is an equidigital number, since it uses as much as digits as its factorization.

2061526421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 2061526421 is about 45404.0352942335. The cubic root of 2061526421 is about 1272.7105233342.

The spelling of 2061526421 in words is "two billion, sixty-one million, five hundred twenty-six thousand, four hundred twenty-one".