525526621 has 2 divisors, whose sum is σ = 525526622. Its totient is φ = 525526620.

The previous prime is 525526597. The next prime is 525526633. The reversal of 525526621 is 126625525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 462895225 + 62631396 = 21515^2 + 7914^2 .

It is a cyclic number.

It is not a de Polignac number, because 525526621 - 2¹⁵ = 525493853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525526021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262763310 + 262763311.

It is an arithmetic number, because the mean of its divisors is an integer number (262763311).

Almost surely, 2^525526621 is an apocalyptic number.

It is an amenable number.

525526621 is a deficient number, since it is larger than the sum of its proper divisors (1).

525526621 is an equidigital number, since it uses as much as digits as its factorization.

525526621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 34.

The square root of 525526621 is about 22924.3674067574. The cubic root of 525526621 is about 806.9839679230.

The spelling of 525526621 in words is "five hundred twenty-five million, five hundred twenty-six thousand, six hundred twenty-one".