1475523252421 has 2 divisors, whose sum is σ = 1475523252422. Its totient is φ = 1475523252420.

The previous prime is 1475523252419. The next prime is 1475523252439. The reversal of 1475523252421 is 1242523255741.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1257470676900 + 218052575521 = 1121370^2 + 466961^2 .

It is a cyclic number.

It is not a de Polignac number, because 1475523252421 - 2¹ = 1475523252419 is a prime.

It is a super-2 number, since 2×1475523252421² (a number of 25 digits) contains 22 as substring.

Together with 1475523252419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1475523252491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 737761626210 + 737761626211.

It is an arithmetic number, because the mean of its divisors is an integer number (737761626211).

Almost surely, 2^{1475523252421} is an apocalyptic number.

It is an amenable number.

1475523252421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1475523252421 is an equidigital number, since it uses as much as digits as its factorization.

1475523252421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672000, while the sum is 43.

The spelling of 1475523252421 in words is "one trillion, four hundred seventy-five billion, five hundred twenty-three million, two hundred fifty-two thousand, four hundred twenty-one".