1553400231 has 8 divisors (see below), whose sum is σ = 2071715184. Its totient is φ = 1035342720.

The previous prime is 1553400229. The next prime is 1553400239. The reversal of 1553400231 is 1320043551.

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

It is not a de Polignac number, because 1553400231 - 2¹ = 1553400229 is a prime.

It is a super-2 number, since 2×1553400231² = 4826104555341706722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553400239) 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, 49810 + ... + 74751.

It is an arithmetic number, because the mean of its divisors is an integer number (258964398).

Almost surely, 2^1553400231 is an apocalyptic number.

1553400231 is a deficient number, since it is larger than the sum of its proper divisors (518314953).

1553400231 is a wasteful number, since it uses less digits than its factorization.

1553400231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128721.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1553400231 is about 39413.1986902865. The cubic root of 1553400231 is about 1158.1401605488.

Adding to 1553400231 its reverse (1320043551), we get a palindrome (2873443782).

The spelling of 1553400231 in words is "one billion, five hundred fifty-three million, four hundred thousand, two hundred thirty-one".