622449031 has 4 divisors (see below), whose sum is σ = 642528064. Its totient is φ = 602370000.

The previous prime is 622449019. The next prime is 622449041. The reversal of 622449031 is 130944226.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-622449031 is a prime.

It is a super-2 number, since 2×622449031² = 774885592385677922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 20079001 = 622449031 / (6 + 2 + 2 + 4 + 4 + 9 + 0 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 622448984 and 622449002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622449041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10039470 + ... + 10039531.

It is an arithmetic number, because the mean of its divisors is an integer number (160632016).

Almost surely, 2^622449031 is an apocalyptic number.

622449031 is the 11158-th centered decagonal number.

622449031 is a deficient number, since it is larger than the sum of its proper divisors (20079033).

622449031 is a wasteful number, since it uses less digits than its factorization.

622449031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20079032.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 622449031 is about 24948.9284539437. The cubic root of 622449031 is about 853.8231616506.

It can be divided in two parts, 6224 and 49031, that added together give a palindrome (55255).

The spelling of 622449031 in words is "six hundred twenty-two million, four hundred forty-nine thousand, thirty-one".