137231520 has 96 divisors (see below), whose sum is σ = 444019968. Its totient is φ = 35601408.

The previous prime is 137231473. The next prime is 137231537. The reversal of 137231520 is 25132731.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13897 + ... + 21623.

It is an arithmetic number, because the mean of its divisors is an integer number (4625208).

Almost surely, 2^137231520 is an apocalyptic number.

137231520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 137231520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222009984).

137231520 is an abundant number, since it is smaller than the sum of its proper divisors (306788448).

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

137231520 is a wasteful number, since it uses less digits than its factorization.

137231520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7782 (or 7774 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 137231520 is about 11714.5857801290. The cubic root of 137231520 is about 515.8039036129.

The spelling of 137231520 in words is "one hundred thirty-seven million, two hundred thirty-one thousand, five hundred twenty".