1220550431 has 2 divisors, whose sum is σ = 1220550432. Its totient is φ = 1220550430.

The previous prime is 1220550427. The next prime is 1220550433. The reversal of 1220550431 is 1340550221.

It is a strong prime.

It is an emirp because it is prime and its reverse (1340550221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220550431 - 2² = 1220550427 is a prime.

It is a super-2 number, since 2×1220550431² = 2979486709228571522, which contains 22 as substring.

Together with 1220550433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220550397 and 1220550406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220550433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610275215 + 610275216.

It is an arithmetic number, because the mean of its divisors is an integer number (610275216).

Almost surely, 2^1220550431 is an apocalyptic number.

1220550431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220550431 is an equidigital number, since it uses as much as digits as its factorization.

1220550431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1220550431 is about 34936.3769014476. The cubic root of 1220550431 is about 1068.6904032246.

The spelling of 1220550431 in words is "one billion, two hundred twenty million, five hundred fifty thousand, four hundred thirty-one".