31724061552 has 120 divisors (see below), whose sum is σ = 94026850944. Its totient is φ = 9963879552.

The previous prime is 31724061487. The next prime is 31724061571. The reversal of 31724061552 is 25516042713.

31724061552 is a `hidden beast` number, since 3 + 1 + 7 + 2 + 40 + 61 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150423 + ... + 293385.

Almost surely, 2^31724061552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31724061552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47013425472).

31724061552 is an abundant number, since it is smaller than the sum of its proper divisors (62302789392).

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

31724061552 is a wasteful number, since it uses less digits than its factorization.

31724061552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143067 (or 143058 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 31724061552 in words is "thirty-one billion, seven hundred twenty-four million, sixty-one thousand, five hundred fifty-two".