1220143431 has 16 divisors (see below), whose sum is σ = 1855060704. Its totient is φ = 706689024.

The previous prime is 1220143429. The next prime is 1220143433. The reversal of 1220143431 is 1343410221.

It is an interprime number because it is at equal distance from previous prime (1220143429) and next prime (1220143433).

It is not a de Polignac number, because 1220143431 - 2¹ = 1220143429 is a prime.

It is a super-2 number, since 2×1220143431² = 2977499984424903522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220143398 and 1220143407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220143433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 919506 + ... + 920831.

It is an arithmetic number, because the mean of its divisors is an integer number (115941294).

Almost surely, 2^1220143431 is an apocalyptic number.

1220143431 is a deficient number, since it is larger than the sum of its proper divisors (634917273).

1220143431 is a wasteful number, since it uses less digits than its factorization.

1220143431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840370.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1220143431 is about 34930.5515415946. The cubic root of 1220143431 is about 1068.5716029035.

Adding to 1220143431 its reverse (1343410221), we get a palindrome (2563553652).

The spelling of 1220143431 in words is "one billion, two hundred twenty million, one hundred forty-three thousand, four hundred thirty-one".