145851571731 has 32 divisors (see below), whose sum is σ = 201074199040. Its totient is φ = 93980404224.

The previous prime is 145851571711. The next prime is 145851571739. The reversal of 145851571731 is 137175158541.

It is not a de Polignac number, because 145851571731 - 2⁷ = 145851571603 is a prime.

It is a super-2 number, since 2×145851571731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145851571739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22172715 + ... + 22179291.

It is an arithmetic number, because the mean of its divisors is an integer number (6283568720).

Almost surely, 2^145851571731 is an apocalyptic number.

145851571731 is a deficient number, since it is larger than the sum of its proper divisors (55222627309).

145851571731 is a wasteful number, since it uses less digits than its factorization.

145851571731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8395.

The product of its digits is 588000, while the sum is 48.

The spelling of 145851571731 in words is "one hundred forty-five billion, eight hundred fifty-one million, five hundred seventy-one thousand, seven hundred thirty-one".