425540023 has 2 divisors, whose sum is σ = 425540024. Its totient is φ = 425540022.

The previous prime is 425540009. The next prime is 425540051. The reversal of 425540023 is 320045524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 425540023 - 2²¹ = 423442871 is a prime.

It is a super-2 number, since 2×425540023² = 362168622349681058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 425540023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425540123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212770011 + 212770012.

It is an arithmetic number, because the mean of its divisors is an integer number (212770012).

Almost surely, 2^425540023 is an apocalyptic number.

425540023 is a deficient number, since it is larger than the sum of its proper divisors (1).

425540023 is an equidigital number, since it uses as much as digits as its factorization.

425540023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 425540023 is about 20628.6214517597. The cubic root of 425540023 is about 752.1656063285.

Adding to 425540023 its reverse (320045524), we get a palindrome (745585547).

The spelling of 425540023 in words is "four hundred twenty-five million, five hundred forty thousand, twenty-three".