145537931 has 8 divisors (see below), whose sum is σ = 181449984. Its totient is φ = 113406120.

The previous prime is 145537913. The next prime is 145537933. The reversal of 145537931 is 139735541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145537931 - 2¹⁰ = 145536907 is a prime.

It is a super-2 number, since 2×145537931² = 42362578719521522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145537933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944975 + ... + 945128.

It is an arithmetic number, because the mean of its divisors is an integer number (22681248).

Almost surely, 2^145537931 is an apocalyptic number.

145537931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145537931 is a deficient number, since it is larger than the sum of its proper divisors (35912053).

145537931 is a wasteful number, since it uses less digits than its factorization.

145537931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890121.

The product of its digits is 56700, while the sum is 38.

The square root of 145537931 is about 12063.9102698918. The cubic root of 145537931 is about 526.0076562568.

The spelling of 145537931 in words is "one hundred forty-five million, five hundred thirty-seven thousand, nine hundred thirty-one".