1553050421 has 16 divisors (see below), whose sum is σ = 1691086320. Its totient is φ = 1417720320.

The previous prime is 1553050391. The next prime is 1553050489. The reversal of 1553050421 is 1240503551.

It can be written as a sum of positive squares in 8 ways, for example, as 123454321 + 1429596100 = 11111^2 + 37810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1553050421 is a prime.

It is a super-2 number, since 2×1553050421² = 4823931220336554482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553050921) 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, 1463231 + ... + 1464291.

It is an arithmetic number, because the mean of its divisors is an integer number (105692895).

Almost surely, 2^1553050421 is an apocalyptic number.

It is an amenable number.

1553050421 is a deficient number, since it is larger than the sum of its proper divisors (138035899).

1553050421 is a wasteful number, since it uses less digits than its factorization.

1553050421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1553050421 is about 39408.7607138311. The cubic root of 1553050421 is about 1158.0532202108.

Adding to 1553050421 its reverse (1240503551), we get a palindrome (2793553972).

The spelling of 1553050421 in words is "one billion, five hundred fifty-three million, fifty thousand, four hundred twenty-one".