43320401031 has 32 divisors (see below), whose sum is σ = 61091712000. Its totient is φ = 27250299648.

The previous prime is 43320401029. The next prime is 43320401051. The reversal of 43320401031 is 13010402334.

It is not a de Polignac number, because 43320401031 - 2¹ = 43320401029 is a prime.

It is a super-2 number, since 2×43320401031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43320400989 and 43320401007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43320401051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2687865 + ... + 2703933.

It is an arithmetic number, because the mean of its divisors is an integer number (1909116000).

Almost surely, 2^43320401031 is an apocalyptic number.

43320401031 is a deficient number, since it is larger than the sum of its proper divisors (17771310969).

43320401031 is a wasteful number, since it uses less digits than its factorization.

43320401031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16623.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 43320401031 its reverse (13010402334), we get a palindrome (56330803365).

The spelling of 43320401031 in words is "forty-three billion, three hundred twenty million, four hundred one thousand, thirty-one".