245540531 has 2 divisors, whose sum is σ = 245540532. Its totient is φ = 245540530.

The previous prime is 245540521. The next prime is 245540543. The reversal of 245540531 is 135045542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245540531 - 2¹⁸ = 245278387 is a prime.

It is a super-2 number, since 2×245540531² = 120580304727523922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 245540494 and 245540503.

It is not a weakly prime, because it can be changed into another prime (245540521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122770265 + 122770266.

It is an arithmetic number, because the mean of its divisors is an integer number (122770266).

Almost surely, 2^245540531 is an apocalyptic number.

245540531 is a deficient number, since it is larger than the sum of its proper divisors (1).

245540531 is an equidigital number, since it uses as much as digits as its factorization.

245540531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 245540531 is about 15669.7329587967. The cubic root of 245540531 is about 626.1923104402.

The spelling of 245540531 in words is "two hundred forty-five million, five hundred forty thousand, five hundred thirty-one".