145401531 has 16 divisors (see below), whose sum is σ = 213438720. Its totient is φ = 87311520.

The previous prime is 145401523. The next prime is 145401559. The reversal of 145401531 is 135104541.

It is a happy number.

It is not a de Polignac number, because 145401531 - 2³ = 145401523 is a prime.

It is a super-2 number, since 2×145401531² = 42283210434287922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145401511) 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, 16615 + ... + 23808.

It is an arithmetic number, because the mean of its divisors is an integer number (13339920).

Almost surely, 2^145401531 is an apocalyptic number.

145401531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145401531 is a deficient number, since it is larger than the sum of its proper divisors (68037189).

145401531 is a wasteful number, since it uses less digits than its factorization.

145401531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40546.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 145401531 is about 12058.2557196304. The cubic root of 145401531 is about 525.8432778717.

The spelling of 145401531 in words is "one hundred forty-five million, four hundred one thousand, five hundred thirty-one".