75221453 has 2 divisors, whose sum is σ = 75221454. Its totient is φ = 75221452.

The previous prime is 75221449. The next prime is 75221483. The reversal of 75221453 is 35412257.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74684164 + 537289 = 8642^2 + 733^2 .

It is a cyclic number.

It is not a de Polignac number, because 75221453 - 2² = 75221449 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75221483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37610726 + 37610727.

It is an arithmetic number, because the mean of its divisors is an integer number (37610727).

Almost surely, 2^75221453 is an apocalyptic number.

It is an amenable number.

75221453 is a deficient number, since it is larger than the sum of its proper divisors (1).

75221453 is an equidigital number, since it uses as much as digits as its factorization.

75221453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 29.

The square root of 75221453 is about 8673.0302086410. The cubic root of 75221453 is about 422.1309930038.

The spelling of 75221453 in words is "seventy-five million, two hundred twenty-one thousand, four hundred fifty-three".