145399031 has 8 divisors (see below), whose sum is σ = 152216064. Its totient is φ = 138623320.

The previous prime is 145399027. The next prime is 145399043. The reversal of 145399031 is 130993541.

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 145399031 - 2² = 145399027 is a prime.

It is a super-2 number, since 2×145399031² = 42281756431477922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145398982 and 145399000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145399081) 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, 3011 + ... + 17316.

It is an arithmetic number, because the mean of its divisors is an integer number (19027008).

Almost surely, 2^145399031 is an apocalyptic number.

145399031 is a deficient number, since it is larger than the sum of its proper divisors (6817033).

145399031 is a wasteful number, since it uses less digits than its factorization.

145399031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20661.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 145399031 is about 12058.1520557671. The cubic root of 145399031 is about 525.8402641122.

The spelling of 145399031 in words is "one hundred forty-five million, three hundred ninety-nine thousand, thirty-one".