207220421 has 8 divisors (see below), whose sum is σ = 210155904. Its totient is φ = 204301440.

The previous prime is 207220411. The next prime is 207220427. The reversal of 207220421 is 124022702.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207220421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 207220393 and 207220402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207220427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22346 + ... + 30228.

It is an arithmetic number, because the mean of its divisors is an integer number (26269488).

Almost surely, 2^207220421 is an apocalyptic number.

It is an amenable number.

207220421 is a deficient number, since it is larger than the sum of its proper divisors (2935483).

207220421 is an equidigital number, since it uses as much as digits as its factorization.

207220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8251.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 207220421 is about 14395.1526910971. The cubic root of 207220421 is about 591.7580627001.

The spelling of 207220421 in words is "two hundred seven million, two hundred twenty thousand, four hundred twenty-one".