145917031 has 16 divisors (see below), whose sum is σ = 163545088. Its totient is φ = 129276000.

The previous prime is 145917019. The next prime is 145917043. The reversal of 145917031 is 130719541.

It is an interprime number because it is at equal distance from previous prime (145917019) and next prime (145917043).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145917031 is a prime.

It is a super-2 number, since 2×145917031² = 42583559871709922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 145916984 and 145917002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145917631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49756 + ... + 52606.

It is an arithmetic number, because the mean of its divisors is an integer number (10221568).

Almost surely, 2^145917031 is an apocalyptic number.

145917031 is a deficient number, since it is larger than the sum of its proper divisors (17628057).

145917031 is a wasteful number, since it uses less digits than its factorization.

145917031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 145917031 is about 12079.6122040403. The cubic root of 145917031 is about 526.4639785579.

The spelling of 145917031 in words is "one hundred forty-five million, nine hundred seventeen thousand, thirty-one".