1522023661 has 2 divisors, whose sum is σ = 1522023662. Its totient is φ = 1522023660.

The previous prime is 1522023599. The next prime is 1522023667. The reversal of 1522023661 is 1663202251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1515622761 + 6400900 = 38931^2 + 2530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1522023661 - 2¹⁹ = 1521499373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1522023667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761011830 + 761011831.

It is an arithmetic number, because the mean of its divisors is an integer number (761011831).

Almost surely, 2^1522023661 is an apocalyptic number.

It is an amenable number.

1522023661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522023661 is an equidigital number, since it uses as much as digits as its factorization.

1522023661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1522023661 is about 39013.1216515674. The cubic root of 1522023661 is about 1150.2894447236.

The spelling of 1522023661 in words is "one billion, five hundred twenty-two million, twenty-three thousand, six hundred sixty-one".