245151117 has 20 divisors (see below), whose sum is σ = 366801820. Its totient is φ = 163171584.

The previous prime is 245151083. The next prime is 245151119. The reversal of 245151117 is 711151542.

It can be written as a sum of positive squares in 2 ways, for example, as 200675556 + 44475561 = 14166^2 + 6669^2 .

It is not a de Polignac number, because 245151117 - 2¹⁴ = 245134733 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245151119) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 57309 + ... + 61437.

It is an arithmetic number, because the mean of its divisors is an integer number (18340091).

Almost surely, 2^245151117 is an apocalyptic number.

245151117 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

245151117 is a deficient number, since it is larger than the sum of its proper divisors (121650703).

245151117 is an equidigital number, since it uses as much as digits as its factorization.

245151117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4874 (or 4865 counting only the distinct ones).

The product of its digits is 1400, while the sum is 27.

The square root of 245151117 is about 15657.3023538539. The cubic root of 245151117 is about 625.8610995739.

The spelling of 245151117 in words is "two hundred forty-five million, one hundred fifty-one thousand, one hundred seventeen".