247173172240 has 40 divisors (see below), whose sum is σ = 574746606720. Its totient is φ = 98857401216.

The previous prime is 247173172223. The next prime is 247173172313. The reversal of 247173172240 is 42271371742.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×247173172240² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 247173172193 and 247173172202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500991 + ... + 863329.

It is an arithmetic number, because the mean of its divisors is an integer number (14368665168).

Almost surely, 2^247173172240 is an apocalyptic number.

247173172240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247173172240 is an abundant number, since it is smaller than the sum of its proper divisors (327573434480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247173172240 is a wasteful number, since it uses less digits than its factorization.

247173172240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370879 (or 370873 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 40.

The spelling of 247173172240 in words is "two hundred forty-seven billion, one hundred seventy-three million, one hundred seventy-two thousand, two hundred forty".