1400221531 has 8 divisors (see below), whose sum is σ = 1468030464. Its totient is φ = 1332990120.

The previous prime is 1400221523. The next prime is 1400221619. The reversal of 1400221531 is 1351220041.

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

It is a cyclic number.

It is not a de Polignac number, because 1400221531 - 2³ = 1400221523 is a prime.

It is a super-2 number, since 2×1400221531² = 3921240671751967922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1400221499 and 1400221508.

It is not an unprimeable number, because it can be changed into a prime (1400221231) 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, 139411 + ... + 149116.

It is an arithmetic number, because the mean of its divisors is an integer number (183503808).

Almost surely, 2^1400221531 is an apocalyptic number.

1400221531 is a deficient number, since it is larger than the sum of its proper divisors (67808933).

1400221531 is a wasteful number, since it uses less digits than its factorization.

1400221531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288761.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1400221531 is about 37419.5340831497. The cubic root of 1400221531 is about 1118.7479447503.

Adding to 1400221531 its reverse (1351220041), we get a palindrome (2751441572).

The spelling of 1400221531 in words is "one billion, four hundred million, two hundred twenty-one thousand, five hundred thirty-one".