1552260021 has 32 divisors (see below), whose sum is σ = 2382162048. Its totient is φ = 890603520.

The previous prime is 1552259999. The next prime is 1552260029. The reversal of 1552260021 is 1200622551.

It is a happy number.

It is not a de Polignac number, because 1552260021 - 2⁶ = 1552259957 is a prime.

It is a super-2 number, since 2×1552260021² = 4819022345589840882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1552259973 and 1552260000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1552260029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60001 + ... + 81881.

It is an arithmetic number, because the mean of its divisors is an integer number (74442564).

Almost surely, 2^1552260021 is an apocalyptic number.

It is an amenable number.

1552260021 is a deficient number, since it is larger than the sum of its proper divisors (829902027).

1552260021 is a wasteful number, since it uses less digits than its factorization.

1552260021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22021.

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

The square root of 1552260021 is about 39398.7312105352. The cubic root of 1552260021 is about 1157.8567293614.

Adding to 1552260021 its reverse (1200622551), we get a palindrome (2752882572).

The spelling of 1552260021 in words is "one billion, five hundred fifty-two million, two hundred sixty thousand, twenty-one".