101532390 has 32 divisors (see below), whose sum is σ = 256504320. Its totient is φ = 25650144.

The previous prime is 101532377. The next prime is 101532391. The reversal of 101532390 is 93235101.

It is a happy number.

It is a super-2 number, since 2×101532390² = 20617652438224200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101532390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101532391) 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, 88494 + ... + 89633.

It is an arithmetic number, because the mean of its divisors is an integer number (8015760).

Almost surely, 2^101532390 is an apocalyptic number.

101532390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101532390 is an abundant number, since it is smaller than the sum of its proper divisors (154971930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101532390 is a wasteful number, since it uses less digits than its factorization.

101532390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178156.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 101532390 is about 10076.3282002920. The cubic root of 101532390 is about 466.5177830046.

Adding to 101532390 its reverse (93235101), we get a palindrome (194767491).

The spelling of 101532390 in words is "one hundred one million, five hundred thirty-two thousand, three hundred ninety".