49431489731 has 16 divisors (see below), whose sum is σ = 54633417888. Its totient is φ = 44433619200.

The previous prime is 49431489727. The next prime is 49431489773. The reversal of 49431489731 is 13798413494.

It is a cyclic number.

It is not a de Polignac number, because 49431489731 - 2² = 49431489727 is a prime.

It is a super-2 number, since 2×49431489731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49431489131) 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, 202640 + ... + 374066.

It is an arithmetic number, because the mean of its divisors is an integer number (3414588618).

Almost surely, 2^49431489731 is an apocalyptic number.

49431489731 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

49431489731 is a deficient number, since it is larger than the sum of its proper divisors (5201928157).

49431489731 is a wasteful number, since it uses less digits than its factorization.

49431489731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172022.

The product of its digits is 2612736, while the sum is 53.

The spelling of 49431489731 in words is "forty-nine billion, four hundred thirty-one million, four hundred eighty-nine thousand, seven hundred thirty-one".