1553051231 has 8 divisors (see below), whose sum is σ = 1578092544. Its totient is φ = 1528098040.

The previous prime is 1553051219. The next prime is 1553051233. The reversal of 1553051231 is 1321503551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1553051231 is a prime.

It is a super-2 number, since 2×1553051231² = 4823936252221230722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1553051231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553051233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13970 + ... + 57456.

It is an arithmetic number, because the mean of its divisors is an integer number (197261568).

Almost surely, 2^1553051231 is an apocalyptic number.

1553051231 is a deficient number, since it is larger than the sum of its proper divisors (25041313).

1553051231 is an equidigital number, since it uses as much as digits as its factorization.

1553051231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44061.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 1553051231 is about 39408.7709907325. The cubic root of 1553051231 is about 1158.0534215399.

Adding to 1553051231 its reverse (1321503551), we get a palindrome (2874554782).

The spelling of 1553051231 in words is "one billion, five hundred fifty-three million, fifty-one thousand, two hundred thirty-one".