1223151431 has 8 divisors (see below), whose sum is σ = 1276933344. Its totient is φ = 1169419680.

The previous prime is 1223151421. The next prime is 1223151463. The reversal of 1223151431 is 1341513221.

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-1223151431 is a prime.

It is a super-2 number, since 2×1223151431² = 2992198846314695522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223151397 and 1223151406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223151421) 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, 42485 + ... + 65201.

It is an arithmetic number, because the mean of its divisors is an integer number (159616668).

Almost surely, 2^1223151431 is an apocalyptic number.

1223151431 is a deficient number, since it is larger than the sum of its proper divisors (53781913).

1223151431 is a wasteful number, since it uses less digits than its factorization.

1223151431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25081.

The product of its digits is 720, while the sum is 23.

The square root of 1223151431 is about 34973.5819012008. The cubic root of 1223151431 is about 1069.4489930951.

Adding to 1223151431 its reverse (1341513221), we get a palindrome (2564664652).

The spelling of 1223151431 in words is "one billion, two hundred twenty-three million, one hundred fifty-one thousand, four hundred thirty-one".