31200421343 has 32 divisors (see below), whose sum is σ = 38750208000. Its totient is φ = 24461740800.

The previous prime is 31200421327. The next prime is 31200421381. The reversal of 31200421343 is 34312400213.

It is not a de Polignac number, because 31200421343 - 2⁴ = 31200421327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200421843) 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, 17323043 + ... + 17324843.

It is an arithmetic number, because the mean of its divisors is an integer number (1210944000).

Almost surely, 2^31200421343 is an apocalyptic number.

31200421343 is a deficient number, since it is larger than the sum of its proper divisors (7549786657).

31200421343 is a wasteful number, since it uses less digits than its factorization.

31200421343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31200421343 its reverse (34312400213), we get a palindrome (65512821556).

The spelling of 31200421343 in words is "thirty-one billion, two hundred million, four hundred twenty-one thousand, three hundred forty-three".