42291553 has 2 divisors, whose sum is σ = 42291554. Its totient is φ = 42291552.

The previous prime is 42291551. The next prime is 42291559. The reversal of 42291553 is 35519224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38651089 + 3640464 = 6217^2 + 1908^2 .

It is a cyclic number.

It is not a de Polignac number, because 42291553 - 2¹ = 42291551 is a prime.

Together with 42291551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42291551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21145776 + 21145777.

It is an arithmetic number, because the mean of its divisors is an integer number (21145777).

Almost surely, 2^42291553 is an apocalyptic number.

It is an amenable number.

42291553 is a deficient number, since it is larger than the sum of its proper divisors (1).

42291553 is an equidigital number, since it uses as much as digits as its factorization.

42291553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 42291553 is about 6503.1955990882. The cubic root of 42291553 is about 348.4051327211.

The spelling of 42291553 in words is "forty-two million, two hundred ninety-one thousand, five hundred fifty-three".