247321015420 has 12 divisors (see below), whose sum is σ = 519374132424. Its totient is φ = 98928406160.

The previous prime is 247321015363. The next prime is 247321015439. The reversal of 247321015420 is 24510123742.

It is a happy number.

It is a super-2 number, since 2×247321015420² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6183025366 + ... + 6183025405.

It is an arithmetic number, because the mean of its divisors is an integer number (43281177702).

Almost surely, 2^247321015420 is an apocalyptic number.

247321015420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247321015420 is an abundant number, since it is smaller than the sum of its proper divisors (272053117004).

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

247321015420 is a wasteful number, since it uses less digits than its factorization.

247321015420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12366050780 (or 12366050778 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The spelling of 247321015420 in words is "two hundred forty-seven billion, three hundred twenty-one million, fifteen thousand, four hundred twenty".