253405465 has 16 divisors (see below), whose sum is σ = 308215440. Its totient is φ = 199987200.

The previous prime is 253405463. The next prime is 253405469. The reversal of 253405465 is 564504352.

253405465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 627264 + 252778201 = 792^2 + 15899^2 .

It is not a de Polignac number, because 253405465 - 2¹ = 253405463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253405465.

It is not an unprimeable number, because it can be changed into a prime (253405463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169441 + ... + 170929.

It is an arithmetic number, because the mean of its divisors is an integer number (19263465).

Almost surely, 2^253405465 is an apocalyptic number.

It is an amenable number.

253405465 is a deficient number, since it is larger than the sum of its proper divisors (54809975).

253405465 is a wasteful number, since it uses less digits than its factorization.

253405465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932.

The product of its (nonzero) digits is 72000, while the sum is 34.

The square root of 253405465 is about 15918.7143010986. The cubic root of 253405465 is about 632.8080456710.

The spelling of 253405465 in words is "two hundred fifty-three million, four hundred five thousand, four hundred sixty-five".