152021540 has 48 divisors (see below), whose sum is σ = 351074304. Its totient is φ = 54835200.

The previous prime is 152021533. The next prime is 152021561. The reversal of 152021540 is 45120251.

It is a super-2 number, since 2×152021540² = 46221097247943200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25220 + ... + 30660.

It is an arithmetic number, because the mean of its divisors is an integer number (7314048).

Almost surely, 2^152021540 is an apocalyptic number.

152021540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 152021540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175537152).

152021540 is an abundant number, since it is smaller than the sum of its proper divisors (199052764).

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

152021540 is a wasteful number, since it uses less digits than its factorization.

152021540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588 (or 5586 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 152021540 is about 12329.7015373447. The cubic root of 152021540 is about 533.7055379271.

Adding to 152021540 its reverse (45120251), we get a palindrome (197141791).

The spelling of 152021540 in words is "one hundred fifty-two million, twenty-one thousand, five hundred forty".