31449137550 has 24 divisors (see below), whose sum is σ = 77993861496. Its totient is φ = 8386436640.

The previous prime is 31449137537. The next prime is 31449137557. The reversal of 31449137550 is 5573194413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31449137557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104830309 + ... + 104830608.

It is an arithmetic number, because the mean of its divisors is an integer number (3249744229).

Almost surely, 2^31449137550 is an apocalyptic number.

31449137550 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31449137550 is an abundant number, since it is smaller than the sum of its proper divisors (46544723946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31449137550 is a wasteful number, since it uses less digits than its factorization.

31449137550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209660932 (or 209660927 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 31449137550 in words is "thirty-one billion, four hundred forty-nine million, one hundred thirty-seven thousand, five hundred fifty".